PVC Stabilizers are essential in the extrusion and injection of PVC, as they avoid the degradation of the polymer during the process of extrusion and also enhance the mechanical properties of the finished product. Main Products: TS-300, TS-500, TS-600, TS-600H, TS-650NC, TS-810 Main applications: + PVC Pipe & Fittings + Profile & Flooring + Cables & Wires Origin: Vietnam MOQ: 01 MT Payment term: LC at sight or 30% advance & 70% against copy docs
Melting point 151-154 C(lit.) Boiling point 265 C100 mm Hg(lit.) Density 1,36 g/cm3 vapor density 5 (vs air) vapor pressure 1 mm Hg ( 159.5 C) refractive index 1.4880 FEMA 2011 | ADIPIC ACID Flash point 385 F storage temp. Store below +30C. solubility methanol: 0.1 g/mL, clear, colorless pka 4.43(at 25) form Solid color White Odor wh. monoclinic prisms, pract. odorless PH 3.74(1 mM solution);3.22(10 mM solution);2.71(100 mM solution); Water Solubility 1.44 g/100 mL (15 C) Merck 14,162 JECFA Number 623 BRN 1209788 Exposure limits ACGIH: TWA 5 mg/m3 Stability Stable. Substances to be avoided include ammonia, strong oxidizing agents. InChIKey WNLRTRBMVRJNCN-UHFFFAOYSA-N LogP 0.09 at 25â?? FDA 21 CFR 184.1009; 582.1009; 175.300; 175.320; 177.1680 Substances Added to Food (formerly EAFUS) ADIPIC ACID SCOGS (Select Committee on GRAS Substances) Adipic acid CAS DataBase Reference 124-04-9(CAS DataBase Reference) EWG's Food Scores 1 FDA UNII 76A0JE0FKJ NIST Chemistry Reference Hexanedioic acid(124-04-9) EPA Substance Registry System Adipic acid (124-04-9)
1 Quick Details Product Name: PVC One Pack Ca-Zn Stabilizer Product Model:AIMSTA-CZ451 Main applications: rubber sole and plaything Appearance: Powder Package: 50kg in plastic bucket Storage: in a cool dry place, to avoid sun and rain CasNo:1592-23-0 Certifications: REACH & RoHS HS code :3812399000 Purity:99.00% Payment term: :L/C,T/T,LC at sight or 30% advance & 70% against copy docs Min.Order:1 Metric Ton Origin: China Port: Shenzhen port, China Transportation: By sea ProductionCapacity:100000 Metric Ton/Year 2 Key specifications/special features Non-toxic stabilizer, No lead, cadmium no harmful chemical. Good transparency, good initial coloring, good dynamic processing performance. No phenol, smell-less. Dynamic lubrication balance 3 Product origin PVC resin molding processing into PVC plastic products, must be added to a variety of additives, in order to ensure the smooth molding of products and have excellent performance. Stabilizer is help to keep plastic performance or close to the original performance and material added in the formulation, is to stop or inhibit polymer by outside factors (light/hot/oxygen/mold/bacteria that simple long stored) caused by the damage. 4 Superiority Our Ca-Zn Stabilizer is manufactured according to the advanced concept of environmental protection which is free of lead, Cd, barium, tin, or any other harmful metals. Our Ca-Zn Stabilizer meets the latest European environmental protection standards of REACH & RoHS. 5 Keywords PVC stabilizer , stabilizer, heat stabilizer, chemical additive, plastic additives, pvc heat stabilizer, pvc compound stabilizer Calcium-Zinc stabilizer
PA66 GF regrind black color Pa6 / pa66 is mainly applied as follows: 1. Improves nylon water absorption and improves size stability of the product. 2. Improved nylon fire resistance to meet the requirements of electronics, electrical, communications and other industries. 3. Improved mechanical strength of nylon to achieve the strength of metal materials, metal replacement. 4. Improves nylon low-temperature resistance and enhanced resistance to environmental stress. 5. Improves nylon wear resistance to meet high wear resistance requirements. 6. Improves nylon antistatic properties to meet its extraction requirements and mechanical applications. 7. Improves nylon heat resistance to adapt to high temperature conditions such as car engines. 8. Reduce nylon cost and improve product competitiveness. Through the above modification, high performance and functionalization of nylon composite materials are realized, thereby promoting the development of industries involving high performance and high quality. MATERIAL: PA66 GF regrind black color CATEGORY: PA66 GF TYPE: Regrind GRADE: Black color SPECIFICATION: GF50. 1 full container available Origin: Tunisia LOADING WEIGHT: 23 Ton FOB (USD/Ton): 850$ - 1050$ Packaging: Jumbo Bag Est. Shipping Time: 15, 30, 45 days
Chlorinated paraffin Basic information Product Name: Chlorinated paraffin CAS: 106232-86-4 MF: C24H44Cl6 MW: 0 EINECS: 264-150-0 Chlorinated paraffin Chemical Properties density 1.16 FreezingPoint -30 CAS DataBase Reference 106232-86-4 COA Items Specification Appearance pale yellow to yellow oily viscous liquid Freezing point < -20 C Density 1.22-1.26 Assay% 50+/- 2 Thermal stability index 175C, 4h chlorine nitrogen (10L / h) HCL% 0.1 Conclusion Accords with the enterprise standard
Agar agar, E406, CAS 9002-18-0, food thickener, polysaccharides extracted from seaweed. Properties: coagulability, stability, form the complex with some materials. It can be used as a thickener, coagulant, suspending agents, emulsifiers, preservatives and stabilizers. Agar Agar is widely used in a variety of drinks, jelly, ice cream, cakes, candy, canned food, meat products and so on. Function and uses: It is one of the most extensive use of sodium alginate in the word. Agar Agar is hydrophilic colloid with dividing into strips and powder. As an experienced Agar agar manufacturer and supplier, we has been supplying and exporting Agar agar for almost 10 years, please be assured to buy from us. Any inquiries about price and the market trend please feel free to contact us, we will reply you within 1 working day.
Sodium Stearoyl Lactylate, E481,CAS No.25383-99-7, is a versatile safe food emusifier manufactured through esterification of stearic acid with lactic acid and partially neutralized with food-grade soda ash, available as White or slightly yellowish powder or brittle solid with a characteristic odour. Sodium Stearoyl Lactylate can be used to prevent dough from aging, increase foaming stability, and improve taste, texture, and stability. It can be used in bread, cake, flour products, ice cream, beverages, creams, etc. As an experienced Sodium Stearoyl Lactylate manufacturer and supplier, we has been supplying and exporting Sodium Stearoyl Lactylate for almost 10 years, please be assured to buy from us. Any inquiries about price and the market trend please feel free to contact us, we will reply you within 1 working day. Sodium Stearoyl Lactylate Specification ITEM STANDARD Appearance White or slightly yellowish powder or brittle solid with a characteristic odour Acid Value (mgKOH/g) 74 Ester Value (mgKOH/g) 180 Heavy Metals(pb) (mg/kg) 10mg/kg Arsenic(mg/kg) 3 mg/kg Sodium % 1.9 Total lactic acid % 29 Lead (mg/kg) 3.2 mercury(mg/kg) 0.09 Cadmium(mg/kg) 0.8
White Oil Grades available Meeting requirements of BP, USP AND IP Standards are as below :- 1. WHITE MINERAL OIL INDUSTRIAL GRADES - TECH GRADES ( For use in Rubbers , PVC , Polymers , EPDM , Butyl Rubber ) Industrial Grades are used in polymer and plastic industries and are tailored with respect to boiling point distribution and viscosity characteristics. The characteristics of the oil impart good plasticization effect on the finished product while ensuring retention of oil within the polymer. It is non-toxic and environmentally friendly, and has good compatibility with rubber. It is particularly suitable for EPDM and butyl rubbers, Non-polar rubber such as natural rubber and thermoplastic rubber. DANA WHITE OIL TECH 8 DANA WHITE OIL TECH 10 DANA WHITE OIL TECH 15 DANA WHITE OIL TECH 20 DANA WHITE OIL TECH 30 , 32 DANA WHITE OIL TECH 40 , 46 DANA WHITE OIL TECH 60 , 68, 70( HEAVY GRADE ) DANA WHITE OIL TECH 80 ( HEAVY GRADE ) 2. WHITE MINERAL OIL - COSMETIC GRADE White Mineral Oil Cosmetic Grade is colorless, transparent oil without any additives, water or mechanical impurities.It possesses excellent anti-oxidation, chemical and light stability. This product is suitable for cosmetic applications and for machine lubrication in food and textile industry. DANA WHITE OIL COSMETIC 5 DANA WHITE OIL COSMETIC 8 DANA WHITE OIL COSMETIC 10 DANA WHITE OIL COSMETIC 15 DANA WHITE OIL COSMETIC 20 , 26 DANA WHITE OIL COSMETIC 30 , 32 DANA WHITE OIL COSMETIC 40 , 46 DANA WHITE OIL COSMETIC 60 , 68 , 70( HEAVY GRADE) DANA WHITE OIL COSMETIC 80( HEAVY GRADE)
Sodium Carboxymethyl Cellulose, CMC, E466, CAS no. 9004-32-4, appears as a white to cream powder, and has a viscosity of approximately 5-12000 M.pas., 1% water solution, 25, Brookfield viscometer. CMC is a good emulsion stabilizer, thickener, and has excellent freeze, melt stability, can improve product flavor and prolong storage time. Carboxymethyl Cellulose can compound with other food thickeners (Xanthan gum, Guar gum, Sodium alginate, Gelatin, Carrageenan), and have synergistic effect with them. As an experienced Sodium Carboxymethyl Cellulose manufacturer and supplier, we has been supplying and exporting Sodium Carboxymethyl Cellulose for almost 10 years, please be assured to buy from us. Any inquiries about price and the market trend please feel free to contact us, we will reply you within 1 working day. Sodium Carboxymethyl Cellulose Specification Carboxymethylcellulose E No E466 Einecs No 265-995-8 CAS No. 9004-32-4 HS Code 39123100 Items Standards Viscosity (mpa.s) BROOKFIELD LVTD 4# 30rpm (1% in solution) 3000-8000 PH (1% solution) 6.0â??8.5 Degree of substitution 0.70â??0.90 Purity % Min 99.5 Loss on drying Max 10.0 Coliform( MPN/100g) Max30 Salmonella absent/g Heavy metal (Pb) % Max 0.0010 Iron (Fe) % Max 0.02 Arsenic (As)% Max 0.0002 Lead% Max 0.0005
Carrageenan, E407, CAS no.11114-20-8, is a hydrophilic colloid extracted from certain red algae seaweed, it can be divided into K-type (Kappa), I-type (Iota) and L-type (lambda). Carrageenan is often used in food as the thickening, gelatinizing, suspending, emulsifying and stabilizing agents. Uses: in Jelly: jelly made by carrageenan is full of elasticity and has no off-water property. Uses in Soft Sweets:The transparent fruit sweets made by carrageenan have rich fruit flavors and moderate sweetness. tasty, non-stick to teeth. make the products taste well, full of elasticity, have a small viscosity and improve the stability. Uses in Ice Cream: enables ice cream to have a fine, smooth texture and a good taste. As an experienced Kappa & Iota Carrageenan manufacturer and supplier, we has been supplying and exporting Kappa & Iota Carrageenan for almost 10 years, please be assured to buy from us. Any inquiries about price and the market trend please feel free to contact us, we will reply you within 1 working day. Carrageenan powder Specification Item Standard Appearance Cream white powder Particle Size 95% pass 120 mesh Total sulfate (%) 15~ 40 Loss on drying (%) 12 Water viscosity(1.5%, 75C, mPa.s) 20~ 200 Water gel(1.5%, 0.2%KCl, g/cm2) 1200 Transparence (%) 75 Arsenic (As) 3 mg/kg Lead (Pb) 5 mg/kg Cadium (Cd) 1 mg/kg Mercury (Hg) 1 mg/kg Total plate count 5000 cfu/g Yeast and moulds 300 cfu/g Salmonella spp./ 10g Negative Escherichia coli/ 5g Negative Pathogenic bacteria Negative
Technical Information * Chemical Name: Sodium Carbonate Peroxyhydrate * Synonyms: Sodium Percarbonate, SPC,PCS, * Molecular Formula: 2Na2CO3.3H2O2 * Melecular Weight: 314.02 * CAS Number:15630-89-4 Product Specifications Product Sodium Percarbonate Coated / Uncoated (20-30 mesh) Sodium Percarbonate Coated / Uncoated (10-40 mesh) Expert of Aerobic Washing Fishes oxygen-bar Sodium Percarbonate Coated Sodium Percarbonate Low Oxygen Sodium Percarbonate Tablet Property white granular crystal white granular crystal white powder or granular crystal white powder or granular crystal (20-80mesh) white tablet or column Quality Index Granularity (mesh) 20-30 10-40 20-80 20-80 --- Active Oxygen %min 13.5 13.5 13 10 11 Bulk Density (g/ml) 0.9-1.2 0.8-1.2 0.4-1.2 0.4-1.2 --- Moisture %max 1 1 1 1 Fe ppm %max 15 15 15 15 20 PH Value (30g/L water solution) 10-11 10-11 10-11 10-11 10-11 Heat Stability (96â??, 24h) %min 70 70 70 70 --- Wet Stability (32, 80%RH48H)%min 65 55 50 --- Product Applications 1) Widely used in detergents aids or in bleaching agents; 2) As bleaching agent, dyeing & finish agent in textiles industry; 3) As bleaching agent of pulp in paper-making industry; 4) As disinfectant of dishware or in the surface treatment of metals; 5) As oxygen adding agent in medical area; 6) add oxygen for fish and shrimps in sea water/fresh water, oxygen-increasing agent
Technical Information * Chemical Name: Sodium Carbonate Peroxyhydrate * Synonyms: Sodium Percarbonate, SPC,PCS, * Molecular Formula: 2Na2CO3.3H2O2 * Melecular Weight: 314.02 * CAS Number:15630-89-4 Product Specifications Product Sodium Percarbonate Coated / Uncoated (20-30 mesh) Sodium Percarbonate Coated / Uncoated (10-40 mesh) Expert of Aerobic Washing Fishes oxygen-bar Sodium Percarbonate Coated Sodium Percarbonate Low Oxygen Sodium Percarbonate Tablet Property white granular crystal white granular crystal white powder or granular crystal white powder or granular crystal (20-80mesh) white tablet or column Quality Index Granularity (mesh) 20-30 10-40 20-80 20-80 --- Active Oxygen %min 13.5 13.5 13 10 11 Bulk Density (g/ml) 0.9-1.2 0.8-1.2 0.4-1.2 0.4-1.2 --- Moisture %max 1 1 1 1 Fe ppm %max 15 15 15 15 20 PH Value (30g/L water solution) 10-11 10-11 10-11 10-11 10-11 Heat Stability (96â??, 24h) %min 70 70 70 70 --- Wet Stability (32â??, 80%RH48H)%min 65 55 50 --- Product Applications 1) Widely used in detergents aids or in bleaching agents; 2) As bleaching agent, dyeing & finish agent in textiles industry; 3) As bleaching agent of pulp in paper-making industry; 4) As disinfectant of dishware or in the surface treatment of metals; 5) As oxygen adding agent in medical area; 6) add oxygen for fish and shrimps in sea water/fresh water, oxygen-increasing agent
DATEM, E472e, CAS No.6027-23-2, also called diacetyl tartaric acid ester of mono- and diglycerides, food emusifier, a hydrochloride salt of Hordenine manufactured through chemical synthesis. It is an ivory white powder or particle solid. DATEM has the functions to emulsify, increase stabilization, improve preservation, prolong shelf life, and protect freshness, etc. It is mainly used as food emulsifier in bread, cake, butter, hydrogenated vegetable oil and vegetable oil powder. As an experienced DATEM manufacturer and supplier, we has been supplying and exporting DATEM for almost 10 years, please be assured to buy from us. Any inquiries about price and the market trend please feel free to contact us, we will reply you within 1 working day. DATEM Specification ITEM STANDARD Appearance White or off-white solid Acid Value (mgKOH/g) 68 Ester Value (mgKOH/g) 410 Heavy Metals(pb) (mg/kg) 0.1mg/kg Glycerol (w/%) 15 Acetic Acid (w/%) 15 Tartaric Acid (w/%) 13
Ester Gum, E455, CAS no.8050-30-4, manufacturing process via refined wood rosin and glycerin. Ester Gum is the food-grade glycerol ester of wood rosin. Glycerol Esters of Wood Rosin (Ester Gum) appears as a yellow to amber hard rosin, is a food additive that is used as an emulsifier and stabilizer. As an experienced Ester Gum manufacturer and supplier, we has been supplying and exporting Ester Gum for almost 10 years, please be assured to buy from us. Any inquiries about price and the market trend please feel free to contact us, we will reply you within 1 working day. Ester Gum Specification ITEMS STANDARD Appearance Hard, yellow to pale amber-colored resin Identification Solubility: Insoluble in water, soluble in acetone Infrared absorption spectrum: Characteristic of the compound Ring and ball softening range () 82- 90 Acid value (mg KOH/g) 3-9 Specific gravity (25) 1.080- 1.090 Ash (%) 0.1 Lead (Pb) 2 mg/kg Arsenic (As) 3 mg/kg Mercury (Hg) 1 mg/kg Cadmium (Cd) 1 mg/kg Total heavy metals(as Pb) 10 mg/kg Total plate count 5000 cfu/g Yeast & mould 500 cfu/g Salmonella/ 10g Negative E. Coli/ 5g Negative
Sorbitol, E420, Cas no.50-70-4, sugar alcohol, an isomer of mannitol, manufacturing process from corn. Characteristic: Sorbitol is 60% sweet taste and 1/3 less calorie than sucrose; good moisturizer, stabilizer and anti-crystallization agent; used in many kinds of food, including sugar-free confectionery, gums, frozen dessert, bakery food and etc. As an experienced Sorbitol manufacturer and supplier, we has been supplying and exporting Sorbitol for almost 10 years, please be assured to buy from us. Any inquiries about price and the market trend please feel free to contact us, we will reply you within 1 working day. Sorbitol food grade specification ITEM STANDARD APPEARANCE WHITE CRYSTALLINE GRANULE OR POWDER ASSAY 99.0% MN SORBITOL 98.0% MIN REDUCING SUGARS 0.15% MAX TOTAL SUGARS 0.5% MAX PH(50% AQ SOL) 5.0-7.0 RESIDUE ON IGNITION 0.1% MAX HEAVY METALS 5PPM MAX NICKEL 1PPM MAX LEAD 1PPM MAX ARSENIC 1PPM MAX CHLORIDE 50PPM MAX SULPHATE 50PPM MAX TOTAL BACTERIUM 100P/G MAX COLON BACILLUS ABSENT IN 1G
Calcium Alginate, E404, CAS no. 9005-35-0, natural carbohydrate, food thickener manufacturing process extracted from kelp. Calcium Alginate is often used in food as Stabilizer, thickener, gelling agent, emulsifier. As an experienced Calcium Alginate manufacturer and supplier, we has been supplying and exporting Calcium Alginate for almost 10 years, please be assured to buy from us. Any inquiries about price and the market trend please feel free to contact us, we will reply you within 1 working day. Calcium Alginate food grade Specification ITEM STANDARD appearance white to yellowish brown filamentous, grainy, powder assay(C6H7Ca1/2O6)n 89.6%- 104.5% CALCIUM 8.0- 11.5% mesh 90% pass 60 mesh LOSS ON DRYING(105, 4h) 15% PH (1% Solution) 6.0 9.5 sulphate ASH 28- 36% LEAD (PB) 5 PPM ARSENIC (AS) 3 PPM TOTAL HEAVY METAL 20 PPM TOTAL plate COUNT < 5000CFU/G YEAST AND MOULD < 500CFU/G SALMONELLA ABSENT E. COLI ABSENT IN 25 G
Soy Lecithin, E322, CAS no.8002-43-5, a mixture of phospholipids in oil, manufactured through water degumming the extracted oil of soybean. Non-GMO Soy Lecithin appears as a yellow to brown viscous liquid. Soy Lecithin is used as an emulsifier, thickener, stabilizer, mild preservative, and moisturizer. As an emulsifier, it prevents separation from occurring in products such as peanut butter, chocolate, ice cream, and margarine. It can also be used in the baking of bread to improve the texture and size. As an experienced Soy Lecithin manufacturer and supplier, we has been supplying and exporting Soy Lecithin for almost 10 years, please be assured to buy from us. Any inquiries about price and the market trend please feel free to contact us, we will reply you within 1 working day. Soy Lecithin Specification ITEMS STANDARD Appearance Light yellow to brown color, transparent or half-transparent, viscous liquid Acetone Insoluble % 60 Acid Value mg/KOH/g 30 Moisture % 1.0 Peroxide Value( meg/kg) 10 Color Gardner Scale) 14 Hexane Insoluble % 0.5 Salmonella Absent in 25g Standard Plate Count < 6700/G Staphylococcus Aureus < 100/1g Moulds & Yeasts
Sodium Tripolyphosphate, E451, CAS no.7758-29-4, a sodium salt of Phosphoric Acid, white granular or powder, water soluble, the sodium salt of the polyphosphate penta-anion. Sodium Tripolyphosphate functions as a binder, stabilizer, and sequestrant, commonly used in cake mixes, meringues, juices, hams, peas, lima beans, cured pork, sausages, and algin desserts. As an experienced Sodium Tripolyphosphate manufacturer and supplier, we has been supplying and exporting Sodium Tripolyphosphate for almost 10 years, please be assured to buy from us. Any inquiries about price and the market trend please feel free to contact us, we will reply you within 1 working day. Sodium Tripolyphosphate Specification ITEM STANDARD ASSAY (%) (Na5P3O10) 95 MIN APPEARANCE WHITE GRANULAR P2O5 (%) 57.0 MIN FLUORIDE (PPM) 10MAX CADMIUM (PPM) 1 MAX LEAD (PPM) 4 MAX MERCURY (PPM) 1 MAX ARSENIC (PPM) 3 MAX HEAVY MENTAL (AS PB) (PPM) 10 MAX CHLORIDES (AS CL) (%) 0.025 MAX SULPHATES (SO42-) (%) 0.4 MAX SUBSTANCES NOT DISSOLVED IN WATER (%) 0.05 MAX PH VALUE (%) 9.5 â?? 10.0 LOSS ON DRYING 0.7% MAX HEXAHYDRATE 23.5% MAX WATER-INSOLUBLE SUBSTANCES 0.1% MAX HIGHER POLYPHOSPHATES 1% MAX
Dipotassium Phosphate, E340, CAS no.7758-11-4, white powder, water-soluble salt used as a fertilizer, food additive and buffering agent. The manufacturing process of Dipotassium Phosphate is via chemcial synthesis, Phosphoric acid and Potassium hydroxide as raw materials. Dipotassium Phosphate is a common source of phosphorus and potassium. It functions as a stabilizing salt, buffer, and sequestrant. It is used as a food additive or preservative is highly effective in preventing coagulation, and is commonly used in non-dairy creamer as a buffering agent. As an experienced Dipotassium Phosphate manufacturer and supplier, we has been supplying and exporting Dipotassium Phosphate for almost 10 years, please be assured to buy from us. Any inquiries about price and the market trend please feel free to contact us, we will reply you within 1 working day. Dipotassium Phosphate Specification Item Unit Dipotassium phosphate 98% Appearance White powder K2HPO4ï¼?as dry basisï¼? %(w/w) min 98.0 Water-insoluble %(w/w) max 0.2 Arsenic (As) mg/kg max 3 Fluoride (as F) mg/kg max 10 Loss on Drying %(w/w) max 2.0 Pb mg/kg max 2
Carbomer 1.Carbomer (carbomer) is a high molecular weight polymer of acrylic acid bonded with pentaerythritol allyl ether or allyl sucrose. Calculated according to the dry product, the carboxylic acid group (-COOH) should be 56Chemicalbook.0%ï½?68.0%. Carbomer is a very important rheology modifier. The glue combined with water is acidic. The neutralized carbomer is an excellent gel matrix, which is important for thickening and suspension. 2.Carbomer (Carbomer) is a pentaerythritol and other resin that is linked with deformation. It is a very important and fantastic rheological modulated chemistry book section. The neutralized carbomer is an excellent spring limit. , There are important processes such as thickening and suspension, simple, good stability, and a wide range of deep, cream, and medium processes Specification Product Name: Carbomer 940 Appearance White Powder Specification 99% CAS 9007-20-9 Package 1kg/aluminum foil bag; 25kg/drum Sample Availiable Storage Dry Place Shelf life 2 Years Application: Carbomer is used for topical formulations and suitable for preparation of gels, creams and coupling agent. Carbomer and cross-linked acrylic resin as well as series products of these cross-linked polyacrylic acid are widely used at present and are often used in topical lotion, cream and gel. In a neutral environment, Carbomer system is an excellent gel matrix with crystal appearance and nice sense of touch, so Carbomer is suitable for preparation of cream or gel..