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Potassium sorbate, the potassium salt of sorbic acid, is a commonly used preservative in food with the European food additive number E202. Generally, it is synthetic, vegan and gluten-free. This ingredient is used to protect food from spoilage and therefore prolong the food shelf life by slowing the growth of molds and yeasts. You may have seen it in the label of wines, cheeses, cider, mead, soft drinks, and baked goods

INCI Adopted Name: Methyl Paraben CAS Registry No.: 99-76-3 EINECS No.: 202-785-7 Molecular Formula: C8H8O3 Molecular Weight: 152.15 Structural Formula: Synonyms: Methyl p-Hydroxybenzoate; Methyl 4-hydroxybenzoate 4-Hydroxybenzoic acid, methyl ester In food preservative effect: methyl paraben is internationally recognized as broad-spectrum efficient food preservatives,is widely used in soy sauce, vinegar and other spices, pickled products, baking food, sauce products, beverage, wine and fruit and vegetable preservation, etc, This product is widely used in the anti-corrosion of medicine, food, textile industry and other fields such as cosmetics, feed, and daily industrial products.

PTA is one of the important bulk organic raw materials, widely used in chemical fiber, light industry, electronics, construction and other aspects of the national economy. At the same time, the application of PTA is more concentrated. More than 90% of PTA in the world is used to produce polyethylene terephthalate (PET). It needs 0.85-0.86 tons of PTA and 0.33-0.34 tons of MEG to produce 1 ton of pet. Polyester includes fiber chip, polyester fiber, bottle chip and film chip. In the domestic market, 75% of PTA is used in the production of polyester fiber; 20% is used in the production of bottle grade polyester, mainly used in the packaging of various drinks, especially carbonated drinks; 5% is used in film grade polyester, mainly used in packaging materials, films and tapes. It can be seen that the downstream extension product of PTA is mainly polyester fiber. Application: PTA is mostly used in the production of polyethylene terephthalate (polyester). It is an important raw material for polyester fibers, films, plastic products, insulating paints and plasticizers. It is also used in dyes and other products' production.

Ethylene glycol/MEG is also known as ethylene glycol, 1, 2-ethylenediol, or EG for short. Chemical formula is (CH2OH)2, is the simplest dihydric alcohol. Glycol is colorless, odorless, sweet liquid, low toxicity to animals, glycol can be mutually soluble with water, but in the ether class solubility is small. Used as solvent, antifreeze and synthetic polyester raw materials. The polymer of ethylene glycol, polyethylene glycol (PEG), is a phase transfer catalyst and is also used in cell fusion. Items Specification Appearance: Clear,colorless liquid Purity %min 99 Diethylene glycol %max 0.05 Color(APHA)max 10 Water content % max 0.1 Ash,wt.% max 0.005 Chlorides(as CL),ppm max 0.1 Iron,ppm,max 0.07Application 1. Used for making polyester fiber, polyester resin, dehumidifying agents, plasticizers, surfactants, synthetifibers, 2. Can be used as a dye / ink solvent, the preparation of the engine antifreeze, gas dehydration. For the production of synthetic resin, PET, or polyester fiber grade PET, bottle grade PET film used to produce mineral water bottles. 3. Can also produce alkyd resins, also used as antifreeze.

Phoxim is a highly effective and widely used organophosphorus insecticide that belongs to the family of carbamates. It is renowned for its exceptional pest control capabilities and its versatility in various agricultural and horticultural applications. Product Description Packaging & Delivery Packaging Detail: For liquid: 200LTR/drum, 20L/drum, 1L/bottle, 500ml/bottle, 250ml/bottle, 100ml/bottle. For solid: 25 kg/drum, 25kg/bag, 1kg/bag or on the requirement of client. Delivery Detail: 20-30days Specifications Common name: Phoxim (BSI, E-ISO, ESA); Phoxime ((f) F-ISO) IUPAC name: Chemical Abstracts name: A-[[(diethoxyphosphinothioyl)oxy]imino]benzene-acetonitrile CAS RN: 14816-18-3 EC No.: 238-887-3 PHYSICAL CHEMISTRY Mol. Wt.: 298.3 C M. F.: C12H15N2O3PS Form: Yellow liquid; (tech., reddish-brown oil). M. P.: 6.1 C B. P.: Decomposes on distillation V. P. 2.1 MPa (20 C) K OW logP = 3.38 Henry 4.18 10-1 PA m3 mol-1 (calc. ) S. G. /density 1.178 (20 C) Solubility In water 1.5 mg/l (20 C). In toluene, n-hexane, dichloromethane, isopropanol >200 g/l. Slightly soluble in aliphatic hydrocarbons, vegetable and mineral oils. Stability relatively slowly hydrolysed; DT50 (est. ) 26.7 d (pH 4), 7.2 d (pH 7), 3.1 d (pH 9) (22 C). Gradually decomposed under u. V. Irradiation. MAMMALIAN TOXICOLOGY Oral Acute oral LD50 for rats: >2000 mg/kg. Skin and eye Acute percutaneous LD50 for rats: >5000 ml/kg. Not irritating to eyes or skin (rabbits). Inhalation LC50 (4 h) for rats >4.0 mg/l air (aerosol). ADI (JMPR): 0.004 mg/kg b. W. [1999]. Toxicity class WHO (a. I. ) II; EPA (formulation) III EC hazard Xn; R22 ECOTOXICOLOGY Birds LD50 for hens 40 mg/kg. Fish: LC50 (96 h) for rainbow trout 0.53, bluegill sunfish 0.22 mg/l. Daphnia LC50 (48 h): 0.00081 mg/l (80% premixes) Bees: Toxic to bees by contact and respiratory action. APPLICATIONS It's a strong contact insecticide, stomach poison and has a clear effect for larva of Lepidoptera, insects of warehouse mosquito, flying and older cotton bollworm, and a long-effect for insects of subterranean. Application on leaf is short-effect and non-remain. Widely used for prevention and cure of insects for cotton, fruittree, vegetable, soyabean, tea, mulberry etc., such as aphid, thrips, soil, it can prevent and cure of black cutworm, click beetle, peach fruit, borer etc., and dispoes of seed of whear, corn & peanut, also for insects of soil, such as mole cricket, click beetle and so on spraying it can prevent and cure of mosquito and flying etc.

Product name:Dioctyl adipate CAS:103-23-1 MF:C22H42O4 Density:0.925 g/ml Melting point:-67�°C Boiling point:417�°C Package:1 L/bottle, 25 L/drum, 200 L/drum Property:It is soluble in most organic solvents, slightly soluble in ethylene glycol, insoluble in water. Application: DOA is the typical cold-resistant plasticizers with high plasticizing efficiency. Its color changes slightly when heated. It is suitable for PVC, EVC, polystyrene and synthetic rubber resins. It can make downstream products soft even at low temperature, having good light-resistance and hand-feeling. It is usually been used with the main plasticizer DOP and DBP for the production of cold-resistant agricultural thin film, frozen foods packaging film, coating layer of wire and cable, artificial leather, board, outdoor water pipe, etc. In the application of plasticized paste, could make the paste's initial viscosity low and stable.

The aqueous solution of hydrogen fluoride gas is a clear, colorless, fuming corrosive liquid with a strong pungent odor, easily soluble in water and ethanol, and slightly soluble in ether. Hydrofluoric acid is a weak acid with strong corrosiveness, which can strongly corrode metal, glass and silicon-containing objects. It is generally produced in laboratories with fluorite (mainly composed of calcium fluoride) and concentrated sulfuric acid. It needs sealed in a plastic bottle. The chemical industry is used to produce organic and inorganic fluorides (such as potassium fluoride, magnesium fluoride, uranium hexafluoride, calcium fluoride helium, fluororesin, fluoroplastic, fluororubber), dye synthesis, organic synthesis catalyst, and flame-retardant agent etc. In glass processing and production, it is used for frosted bulbs and general bulb treatment, glassware polishing, glass instrument scales, glassware and mirror engraving and lettering. As a cleaning agent for pickling of metal surfaces such as stainless steel. Used in the atomic energy industry, for the production of elemental fluorine and fluorides, and also as catalysts and fluorinating agents.

Introduction: 4-hydroxyethyl piperazine ethosulfonic acid (HEPES) is an important hydrogen ion buffer, which has a good buffer ability in the pH range of 6.8 to 8.2, and can control a constant pH for a long time. Using a concentration of 10 ~ 50mmol/L, the general culture medium containing 20mmol/L 4-hydroxyethyl piperazine taurine can have a good buffer capacity, and has no toxic effect on cells. Application: HEPES (4-hydroxyethyl piperazinethesulfonic acid) is a non-ionic amphoteric buffer with high polarity, and is inert to a variety of chemical reagents and enzymes. It does not participate in and interfere with the process of biochemical reactions, and has no inhibitory effect on enzyme chemical reactions. Therefore, it can be used specifically for the research of proteins and enzymes that are highly volatile and ph-sensitive to organelles and very volatile. Buffer solution preparation: (1)hepes buffer can be directly added to the prepared culture medium according to the desired concentration, and then filtered to remove bacteria. 2.38 g HEPES was added to each 1000ml of culture medium, the pH was adjusted to 7.2 with lNNaOH after dissolution, and the bacteria were removed by filtration before use. At this time, the concentration of HEPES was 10mmol/L. (2) 100x storage solution (lmol/L) could also be prepared. Before use, 99ml culture solution was added to lml storage solution, and the final concentration was 10mmol/L. lmol/L (100x) hepes buffer was prepared as follows: 23.8gHEPES was dissolved in 90ml double distilled water, the pH was adjusted to 7.5-8.0 with lNNaOH, and then the water was fixed to 100ml, filtered to remove bacteria, divided into vials (2ml/ bottle), and stored at 4�ºC or -20�ºC. Purpose: 1.Biological buffer; Reaction buffer, prehybridization buffer and hybridization buffer for isolation and analysis of RNA nuclear fraction; For RNA with T4RNA 2.Molecular biology grade is used for RNA3' -end labeling with T4 RNA ligase 3.Cell-cell adhesion, short-term cell aggregation culture, cleaning of tissue and cell buffer