We deals in the following products of India, China, Taiwan and Korea Origin:- 1) Hot Rolled Steel (Hot Rolled Sheets, Hot Rolled Coils, Hot Rolled Plates, Hot Rolled Bars etc.) 2) Galvanized Steel (Galvanized Steel Tapes, Galvanized Steel Wires, Galvanized Steel Strips, Galvanized Steel Coils, Galvanized tubes etc.) 3) Cold Rolled Steel (Cold Rolled Steel Strips, Cold Rolled Steel Coils, Cold Rolled Sheets etc.) 4) Stainless Steel (Stainless Steel Strips, Stainless Steel Coils, Stainless Steel Wire, Hardened and Tempered Spring Steel, Stainless Spring Steel, Spring Steel Wires etc.) 5) Steel Tube and Pipes (ERW, CRW, CRS, Black, Galvanized, Stainless) 6) Forged Column Clamps, Girder Clamps, Pressed Clamps, Rapid Clamps, Support Clamps & Wedge Clamps. 7) Heavy Duty Props & Light Duty Props. 8) Nuts, Bolts, Nails & Fasteners 9) System Scaffolding, Base Plate & Adjustable Base. 10) Steel Tie Rod, Waller Plates and Wing Nuts. 11) Drop Forged and Pressed Sheet Metal Couplers of all types. 12) Steel Billets, Steel Angle & Steel Channels. Price: After receiving complete details
We deals in the following products of India, China, Taiwan and Korea Origin:- 1) Hot Rolled Steel (Hot Rolled Sheets, Hot Rolled Coils, Hot Rolled Plates, Hot Rolled Bars etc.) 2) Galvanized Steel (Galvanized Steel Tapes, Galvanized Steel Wires, Galvanized Steel Strips, Galvanized Steel Coils, Galvanized tubes etc.) 3) Cold Rolled Steel (Cold Rolled Steel Strips, Cold Rolled Steel Coils, Cold Rolled Sheets etc.) 4) Stainless Steel (Stainless Steel Strips, Stainless Steel Coils, Stainless Steel Wire, Hardened and Tempered Spring Steel, Stainless Spring Steel, Spring Steel Wires etc.) 5) Steel Tube and Pipes (ERW, CRW, CRS, Black, Galvanized, Stainless) 6) Forged Column Clamps, Girder Clamps, Pressed Clamps, Rapid Clamps, Support Clamps & Wedge Clamps. 7) Heavy Duty Props & Light Duty Props. 8) Nuts, Bolts, Nails & Fasteners 9) System Scaffolding, Base Plate & Adjustable Base. 10) Steel Tie Rod, Waller Plates and Wing Nuts. 11) Drop Forged and Pressed Sheet Metal Couplers of all types. 12) Steel Billets, Steel Angle & Steel Channels. Price: After receiving complete details
We deals in the following products of India, China, Taiwan and Korea Origin:- 1) Hot Rolled Steel (Hot Rolled Sheets, Hot Rolled Coils, Hot Rolled Plates, Hot Rolled Bars etc.) 2) Galvanized Steel (Galvanized Steel Tapes, Galvanized Steel Wires, Galvanized Steel Strips, Galvanized Steel Coils, Galvanized tubes etc.) 3) Cold Rolled Steel (Cold Rolled Steel Strips, Cold Rolled Steel Coils, Cold Rolled Sheets etc.) 4) Stainless Steel (Stainless Steel Strips, Stainless Steel Coils, Stainless Steel Wire, Hardened and Tempered Spring Steel, Stainless Spring Steel, Spring Steel Wires etc.) 5) Steel Tube and Pipes (ERW, CRW, CRS, Black, Galvanized, Stainless) 6) Forged Column Clamps, Girder Clamps, Pressed Clamps, Rapid Clamps, Support Clamps & Wedge Clamps. 7) Heavy Duty Props & Light Duty Props. 8) Nuts, Bolts, Nails & Fasteners 9) System Scaffolding, Base Plate & Adjustable Base. 10) Steel Tie Rod, Waller Plates and Wing Nuts. 11) Drop Forged and Pressed Sheet Metal Couplers of all types. 12) Steel Billets, Steel Angle & Steel Channels. Price: After receiving complete details
We deals in the following products of India, China, Taiwan and Korea Origin:- 1) Hot Rolled Steel (Hot Rolled Sheets, Hot Rolled Coils, Hot Rolled Plates, Hot Rolled Bars etc.) 2) Galvanized Steel (Galvanized Steel Tapes, Galvanized Steel Wires, Galvanized Steel Strips, Galvanized Steel Coils, Galvanized tubes etc.) 3) Cold Rolled Steel (Cold Rolled Steel Strips, Cold Rolled Steel Coils, Cold Rolled Sheets etc.) 4) Stainless Steel (Stainless Steel Strips, Stainless Steel Coils, Stainless Steel Wire, Hardened and Tempered Spring Steel, Stainless Spring Steel, Spring Steel Wires etc.) 5) Steel Tube and Pipes (ERW, CRW, CRS, Black, Galvanized, Stainless) 6) Forged Column Clamps, Girder Clamps, Pressed Clamps, Rapid Clamps, Support Clamps & Wedge Clamps. 7) Heavy Duty Props & Light Duty Props. 8) Nuts, Bolts, Nails & Fasteners 9) System Scaffolding, Base Plate & Adjustable Base. 10) Steel Tie Rod, Waller Plates and Wing Nuts. 11) Drop Forged and Pressed Sheet Metal Couplers of all types. 12) Steel Billets, Steel Angle & Steel Channels. Price: After receiving complete details
We deals in the following products of India, China, Taiwan and Korea Origin:- 1)Hot Rolled Steel (Hot Rolled Sheets, Hot Rolled Coils, Hot Rolled Plates, Hot Rolled Bars etc) 2)Galvanized Steel (Galvanized Steel Tapes, Galvanized Steel Wires, Galvanized Steel Strips, Galvanized Steel Coils, Galvanized tubes etc) 3)Cold Rolled Steel (Cold Rolled Steel Strips, Cold Rolled Steel Coils, Cold Rolled Sheets etc) 4)Stainless Steel (Stainless Steel Strips, Stainless Steel Coils, Stainless Steel Wire, Hardened and Tempered Spring Steel, Stainless Spring Steel, Spring Steel Wires etc) 5)Steel Tube and Pipes ( ERW, CRW, CRS, Black, Galvanized, Stainless ) 6)Forged Column Clamps, Girder Clamps, Pressed Clamps, Rapid Clamps, Support Clamps & Wedge Clamps. 7)Heavy Duty Props & Light Duty Props. 8)Nuts, Bolts, Nails & Fastners 9)System Scaffolding, Base Plate & Adjustable Base. 10)Steel Tie Rod, Waller Plates and Wing Nuts. 11)Drop Forged and Pressed Sheet Metal Couplers of all types. 12)Steel Billets, Steel Angle & Steel Channels.
We deals in the following products of India, China, Taiwan and Korea Origin:- 1)Hot Rolled Steel (Hot Rolled Sheets, Hot Rolled Coils, Hot Rolled Plates, Hot Rolled Bars etc) 2)Galvanized Steel (Galvanized Steel Tapes, Galvanized Steel Wires, Galvanized Steel Strips, Galvanized Steel Coils, Galvanized tubes etc) 3)Cold Rolled Steel (Cold Rolled Steel Strips, Cold Rolled Steel Coils, Cold Rolled Sheets etc) 4)Stainless Steel (Stainless Steel Strips, Stainless Steel Coils, Stainless Steel Wire, Hardened and Tempered Spring Steel, Stainless Spring Steel, Spring Steel Wires etc) 5)Steel Tube and Pipes ( ERW, CRW, CRS, Black, Galvanized, Stainless ) 6)Forged Column Clamps, Girder Clamps, Pressed Clamps, Rapid Clamps, Support Clamps & Wedge Clamps. 7)Heavy Duty Props & Light Duty Props. 8)Nuts, Bolts, Nails & Fastners 9)System Scaffolding, Base Plate & Adjustable Base. 10)Steel Tie Rod, Waller Plates and Wing Nuts. 11)Drop Forged and Pressed Sheet Metal Couplers of all types. 12)Steel Billets, Steel Angle & Steel Channels.
Bitumen Primer * Bitumen Primer is Bituminous air curing ready mixed Acid & Alkali resistant special primer. Application * Concrete surface must be clean, dry and rough. No primer should be applied over smooth and wet surface. * After cleaning the concrete surface, one coat of Bitumen Primer should be applied with brush and allow to dry thoroughly. * The drying time will depend upon the temperature. * 24 Month at the temperature 30C (+2OC) Packing * Bitumen Primer: 25 Liter Drum Note * Bitumen Primer contains volatile and slightly toxic solvent. Keep away from spark and open flames at working area. * Bitumen premier it is manufactured using bitumen solution which is used for sealing of prime porous and non-porous surface, and also to protect residential and commercial building. * Bitumen Primer is used to protect substrate against corrosive attack, is suggested to apply anti-corrosive primer.It is best for protection against sub-striate against atmospheric corrosion and chemical corrosion. It is a mixed substance made up of organic liquids that are highly sticky, water proof, viscous,acid proof as with all surface coating, good Bitumen Premier is used for long life of the system. it is applied by brush or roller and allowed to dry before any water proofing treatment so to avoid solvent it is used in defects such as cracks, broken mortar joints, etc. are to be repaired prior to Bitumen primer application. Product Details: Grade Standard Technical Grade Physical State - Liquid Usage - Industrial Color - Black Characteristics: Appearance/Color - Pasty liquid/ black Chemical Base - Bituminous rubber emulsion. Density - 1.0 kg/l Curing Speed/ Rate - 3 - 4 hours Tack free after - 5 - 10 hours Cured after - 2 - 4 days (Dependent on ambient Solid Content by - temperature, substrate temperature, Weight - relative Water Content by weight - humidity and thickness of the coating) Bitumen Content - 41% by weight - Thixotropic (The viscosity can be adjusted by - Viscosity adding up to max. 5% of clean water. - Stir well prior use) - For light protection: 1.0 mm min. Coating - For greater protection: ~ 1.5 - 2.0 mm Thickness applied - in two coats. Water Penetration - 48 h, 1 bar: 78.5 cm2: 0 ml under Hydrostatic - 96 h, 4 bar: 78.5 cm2: 33 ml Pressure - Water vapor 6 x 10-7 mg / hmPa Permeability Service - -30 C to 200 C Temperature - Adhesion Concrete - Very good, Timber: Very good, Metal: Moderate Glass: Poor
1,Hight prurity (99.99% min) Metal Antimony (Sb) 2,4N>99.99%, 5N>99.999%, 6N>99.9999%, 7N>99.99999% 3,Lumps/Ingot/Granule/Bar 4,Color: Gray 5,Atomic weight: 121.760 6,Electronegativity: 2.05 7,CAS No.: 7440-36-0 8,Density: 6.697 g/cm3 (25â??) 9,Melting Point: 630.63 â?? 10,Boiling Point: 1587 â?? 11,Mainly used for the preparation of â?¢ - V compound semiconductor InSb, Bi2Sb, GaSb, high purity alloys, electronic refrigeration element materials and germanium, silicon single crystal dopants.
We deals in the following products of India, China, Taiwan and Korea Origin:- 1)Hot Rolled Steel (Hot Rolled Sheets, Hot Rolled Coils, Hot Rolled Plates, Hot Rolled Bars etc) 2)Galvanized Steel (Galvanized Steel Tapes, Galvanized Steel Wires, Galvanized Steel Strips, Galvanized Steel Coils, Galvanized tubes etc) 3)Cold Rolled Steel (Cold Rolled Steel Strips, Cold Rolled Steel Coils, Cold Rolled Sheets etc) 4)Stainless Steel (Stainless Steel Strips, Stainless Steel Coils, Stainless Steel Wire, Hardened and Tempered Spring Steel, Stainless Spring Steel, Spring Steel Wires etc) 5)Steel Tube and Pipes ( ERW, CRW, CRS, Black, Galvanized, Stainless ) 6)Forged Column Clamps, Girder Clamps, Pressed Clamps, Rapid Clamps, Support Clamps & Wedge Clamps. 7)Heavy Duty Props & Light Duty Props. 8)Nuts, Bolts, Nails & Fastners 9)System Scaffolding, Base Plate & Adjustable Base. 10)Steel Tie Rod, Waller Plates and Wing Nuts. 11)Drop Forged and Pressed Sheet Metal Couplers of all types. 12)Steel Billets, Steel Angle & Steel Channels.
We deals in the following products of India, China, Taiwan and Korea Origin:- 1)Hot Rolled Steel (Hot Rolled Sheets, Hot Rolled Coils, Hot Rolled Plates, Hot Rolled Bars etc) 2)Galvanized Steel (Galvanized Steel Tapes, Galvanized Steel Wires, Galvanized Steel Strips, Galvanized Steel Coils, Galvanized tubes etc) 3)Cold Rolled Steel (Cold Rolled Steel Strips, Cold Rolled Steel Coils, Cold Rolled Sheets etc) 4)Stainless Steel (Stainless Steel Strips, Stainless Steel Coils, Stainless Steel Wire, Hardened and Tempered Spring Steel, Stainless Spring Steel, Spring Steel Wires etc) 5)Steel Tube and Pipes ( ERW, CRW, CRS, Black, Galvanized, Stainless ) 6)Forged Column Clamps, Girder Clamps, Pressed Clamps, Rapid Clamps, Support Clamps & Wedge Clamps. 7)Heavy Duty Props & Light Duty Props. 8)Nuts, Bolts, Nails & Fastners 9)System Scaffolding, Base Plate & Adjustable Base. 10)Steel Tie Rod, Waller Plates and Wing Nuts. 11)Drop Forged and Pressed Sheet Metal Couplers of all types. 12)Steel Billets, Steel Angle & Steel Channels.
Our whole frozen chicken are specially hand Slaughtered accordingly to Islamic (HALAL) and international requirements. All shipments of our products to the ports of delivery are quality inspected with a complete custom approval policy for all goods on board insured and covered with an insurance policy. CHICKEN PARTS; 1. frozen whole chicken 2. frozen chicken feet 3. frozen chicken paws 4. frozen chicken breast 5. frozen chicken thighs 6. frozen chicken drumstick 7. frozen chicken leg quatars 8. frozen chicken wings 9. CHICKEN GIZZARDS 10.CHICKEN LIVER 11.boneeles skinless chicken fillets, and all other chicken parts Detailed Description: - Washed and clean. - Without yellow skin. - No feathers. - No bad smell. - No blood. - No bruises. - No black pads. - No traces of carved deep wounds. - No ammonia burns. - Broken bones: under 3%. - Moisture content: less than 1%. - Drainage: 0 to -5C for 8 hours. - Blasted at: -40C. - Storage at: -18C - 100% Fresh and Frozen Safe for human consumption.
1, Safe working load: 200kg 2, The back board folding angle: 70 3, The thigh board folding angle: 30 4.TR/ATR:0-20 5, The four motors automatically realize various positions. The motors are selected from internationally renowned brand Timotion, which are safe and noiseless. 6, Two control methods, operation handle control and guardrail built-in button operation, control handle is clear and easy to operate; built-in buttons on the side rail near headboard, graphic display, clear at a glance. The key has lock function, which reduces the probability of misoperation and locks safely. 7, Side rail: 1),Two side rail in each side of bed. 2),It can be automatically locked when raising, and each guardrail can bear more than 50KG. 3), Guardrail safety switch design, placed under the guardrail to avoid misuse of the patient; 4), Equipped with gas spring for easy operation. 5), The steel structure of the guardrail base is welded on the bed to ensure safety. 6), The 4-pieces guardrail has angle indicator that allows the caregiver to quickly and easily adjust the backrest angle and TR/ATR angle of the bed. 7),It equipped with guardrail built-in button to make it easier for the patient to operate the bed. 8, Casters 1), The four casters use 125mm center control one. 2), Steel structure, precision ball bearings are placed in the rotating head and the caster, the caster frame is equipped with a wheel cover made of synthetic material, suitable for locking the lever with a cam hole. Caster surface material: polyurethan, passed EN 12531 standard, single dynamic (force) load is not more than 175 kg, static load is not more than 200 kg 3),Braking system: Pedal-type synchronous braking arms on both sides of the bed, adopting all-metal structure, compact structure and reliable braking. 9, Shank board can be adjusted manually by simple steel support for convenience position. 10, At the 4 corners of the bed, there is an diameter HDPE anti-collision wheel which intergated on H/F board. 11, There are 1 hook in each side for drainage bag. 12, It equipped with manual CPR for emergency treatment.
Model Number: UIYDI1212B Frequency Range:0.7~10.0GHz Band width: 30% Insertion Loss: 0.3dB Isolation: 23dB VSWR:1.2 Forward Power: 60W Reverse Power: 20W Connector Type: TAB Temperature: -40~+85â?? Dimension:12.7*12.7*8mm Frequency range 10MHz to 40GHz, up to 2000W power. Military, space and commercial applications. Low insertion loss, high isolation, high power handling. Custom design available upon request.
Betaine, other name, trimethylglycine, CAS No.107-43-7, available as white Crystals or crystalline powder. Betaine is widely used as nutritional supplements. Betaine is available in Betaine Anhydrous and Betaine Monohydrate form. As Betaine Manufacturers, Suppliers and Wholesalers in China, we supply food and feed grade Betaine. As an experienced Betaine manufacturer and supplier, we has been supplying and exporting Betaine 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. Betaine Specification Items USP30 Feed Grade Feed Grade Content ,% 98.0-100.5 98.0 95.0 Loss on drying ,% 0.5 2.0 2.0 Heavy metalsPb,% 0.001 0.001 0.001 As,% 0.0002 0.0002 Residue on ignition,% 0.1 pH1+4 aqueous solution 0.8-1.2 Anti-caking agent 0 0 3.0
Diammonium Phosphate, E342, CAS no.7783-28-0, also known as DAP, is an ammonium salt of Phosphoric Acid, available as White Crystal. Manufacturing process via chemical synthesis, Ammonia and Phosphoric acid as raw materials. Diammonium Phosphate is often used as a yeast nutrient in wine making and brewing mead, mainly used as a fermentation agent. As an experienced Diammonium Phosphate manufacturer and supplier, we has been supplying and exporting Diammonium 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. Diammonium Phosphate Specification No. standard name industrial grade food grade 1 Main content(as (NH4)2HPO4)% 99.0 99.0 2 Phosphorus pent-oxide(as P2O5)% 53.0 53.0 3 Nitrogen(as N)% 20.8 20.8 4 PH value 7.8-8.2 7.8-8.2 5 Moisture% 0.2 0.2 6 Heavy metal(as Pb)% 0.001 7 Arsenic(As)% 0.0003 8 Fluoride(as F)% 0.005 9 Water insoluble % 0.10 0.10
Calcium Acetate Monohydrate, E263, CAS no. 5743-26-0, calcium salt of acetic acid, s a white, odorless, and tasteless crystalline powder. Also known as Calcium acetate, manufacturing process via chemical synthesis, calcium carbonate and acetic acid as raw materials. Calcium Acetate Monohydrate is mainly used in the production of candy products, desserts, and baked good (bread, cakes, pastries). As an experienced Calcium Acetate Monohydrate manufacturer and supplier, we has been supplying and exporting Calcium Acetate Monohydrate 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 Acetate powder Specification Product Calcium Acetate CAS anhydride :62-54-4; monohydrate :5743-26-0 INS 263 EINECS 200-540-9 EEC E263 Structure Molecular formula 1.Anhydrous:Ca(C2H3O2)2 2.Hydrates:C4H6CaO4H2O 3.C4H6CaO4xH2O(x
Product Name: Citicoline Other Name: CDP-Choline; CYTIDINE 5'-DIPHOSPHOCHOLINE Molecular Formula: C14H26N4O11P2 Molecular Weight: 488.33 Boiling Point: 851.4�°C at 760 mmHg Appearance: White powder Purity: 99% CAS number: 987-78-0 EINECSï¼?213-580-7 Supplier: ZHENYIBIO CDP-Choline is a more active form of choline, an essential nutrient used by the brain to stimulate cognitive processes by helping to form phosphatidylcholine. Also called Citicoline, it is a precursor to acetylcholine and is normally found in abundant supply in normal healthy functioning brains. As we age, levels of choline drop and can cause symptoms like memory loss and confusion resulting in a diagnosis of Age-Associated Memory Impairment.
Physical properties 1. Appearance: No residue at 40 deg. C 2. Cold test: Min.48 hours at 0 deg. C 3. Colour: Max.1.2 red, lovibond tintometer 5/20 inch 4. Refractive index:1.465-1.475 at 40 deg. C 5. Density:0.91-0.92 g/cm3 at 20 deg. C 6. Volatile matter: Max.0.07 % at 105 deg. C 7. Taste : Excellent 8. Odor : None Chemical specifications 1. %free fatty acids (ffa): Max 0.1 2. % ash (*): Max.0.05 3. Saponification value:190.32 koh/g. Of oil 4. Iodine value:134.13 (wijs-hanus method) 5. Peroxide:0.2 meq/KG. Of oil 6. % soap:0.0005 7. % unsaponifiable matter: Max.0.12 8. Impurities: None 9. % saturated fat(-ty acids):8-12 10. % unsaturated fat(-ty acids):87-91 11. Feeding energy:900kcal 12. Iron : < 0.02 mg/lt 13. Fatty acid composition : C14:0 :0.06 C16:0 :5.77 C18:0 :4.1 C18:1 :27.3 C18:2 :59.2 C20:0 :0.27 C18:3 :0.25
Product Name: Propionyl-L-Carnitine Hydrochloride Other Name: Levocarnitine Propionate Hydrochloride Molecular Formula: C10H20ClNO4 Molecular Weight: 253.72 Appearance: white or almost crystalline powder Purity: 99.3% CAS Number: 119793-66-7 EINECS number: 922-939-3 Supplier: ZHENYIBIO Propionyl-L-carnitine is a naturally occurring carnitine derivative formed by carnitine acetyltransferase during �²-oxidation of uneven chain fatty acids. Propionyl-L-carnitine increases the basal release of prostaglandin E2 (PGE2; Item No. 14010) and 6-keto-prostaglandin F1�± (Item No. 15210) in carrageenan-stimulated isolated rat peritoneal cells contaminated with neutrophils and increases the basal release of thromboxane B2 (TXB2; Item No. 19030) in non-contaminated cells. It reduces the production of reactive oxygen species (ROS) and decreases the expression of NADPH oxidase 2 (NOX2), NOX4, and ICAM-1 in human umbilical vein endothelial cells (HUVECs). It also increases the rate of revascularization and the hind limb vascular area in a rabbit model of hind limb ischemia when administered at a dose of 10 mg per animal. Propionyl-L-carnitine reduces mitochondrial dysfunction induced by ischemia, preventing mitochondrial calcium overload, and depletion of ATP tissue stores in a rabbit model of ischemia.
Product Name: Dimethyl Sulfone Other Name: Methyl sulfone Sulfonyl bismethane;MSM Molecular Formula: C2H6O2S Molecular Weight: 94.13 Appearance: White Crystals or Crystalline Powder Purity: 99% Mesh: 10-200 CAS Number: 67-71-0 EINECS number: 200-665-9 Supplier: ZHENYIBIO Dimethyl Sulfone (MSM) is an organic sulfur-containing compound that occurs naturally in a variety of fruits, vegetables, grains, and animals including humans. a white, odorless, slightly bitter-tasting crystalline substance containing 34-percent elemental sulfur, MSM is a normal oxidative metabolite product of dimethyl sulfoxide (DMSO). Cowâ??s milk is the most abundant source of MSM, containing approximately 3.3 parts per million (ppm). Other foods containing MSM are coffee (1.6 ppm), tomatoes (trace to 0.86 ppm), tea (0.3 ppm), Swiss chard (0.05-0.18 ppm), beer (0.18 ppm), corn (up to 0.11 ppm), and alfalfa (0.07 ppm).MSM has been isolated from plants such as Equisetum arvense, also known as horsetail. Dimethyl Sulfone has the ability to enhance the body to produce insulin, while it can promote carbohydrate metabolism. It is essential for the synthesis of human collagen. It can not only promote wound healing, but also contribute for metabolic and neurological health requirement of vitamin B and vitamin C, biotin synthesis and activation, so it is known as "naturally beautiful carbon material". Dimethyl Sulfone exists in human skin, hair, nails, bones, muscles and various organs. Once people who are lack of it will get health disorders or diseases. It is the main substance for people to maintain the balance of biological sulfur. It has therapeutic value and healthcare function for people. It is an essential drug for human survial and health protection.