China China High Quality L-Cysteine Hydrochloride Anhydrous Factories - Methyl Paraben｜99-76-3 – COLORKEM Manufacturer and Supplier

China High Quality L-Cysteine Hydrochloride Anhydrous Factories - Methyl Paraben｜99-76-3 – COLORKEM

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China High Quality L-Cysteine Hydrochloride Anhydrous Factories - Methyl Paraben｜99-76-3 – COLORKEM Detail:

Products Description

Methyl paraben, also mEthyl Paraben, one of the parabens, is a preservative with the chemical formula CH3(C6H4(OH)COO). It is the methyl ester of p-hydroxybenzoic acid.

Nature: a white crystalline powder or crystalline. 115-118 ° C melting point, boiling point, 297-298 ° C. Soluble in ethanol, ethyl ether and acetone, micro-soluble in water, chloroform, carbon disulfide and petroleum ether. Minor special aroma and taste, slightly bitter flavor, Zhuo Ma.

Preparation: p-hydroxybenzoic acid and ethanol in the presence of sulfuric acid catalyst for esterification, esterification in the water after the completion of crystallization, then through a filter, in pickling products.Use: organic intermediates. For Preservatives, antimicrobial agent, used in food, cosmetics and pharmaceuticals. Also used for analysis of organic reagents. The goods on mold, yeast and bacteria have broad antibacterial effects, yeast and mold to the role of a strong, but especially for bacteria Gram-negative bacilli and the role of Lactobacillus poor. Food and medicine efficient preservation fungicides.

Specification

ITEM	SPECIFICATION
Appearance	White crystalline powder
Purity	>= 99.0%
Melting point	125- 128
Residue on ignition	=< 0.1%
Acidity (mg/g)	4.0- 7.0
Related substances	=< 0.5%
Identification	Conform
Clarity of solution	Clear and transparent
Heavy metal (as Pb)	=< 10 ppm

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Adhering to the principle of quality, service, efficiency and growth, we have gained trusts and praises from domestic and international client for China High Quality L-Cysteine Hydrochloride Anhydrous Factories - Methyl Paraben｜99-76-3 – COLORKEM , The product will supply to all over the world, such as: United States, Angola, New Delhi, With the enterprising spirit of high efficiency, convenience, practicality and innovation, and in line with such serving guidance of good quality but better price, and global credit, we've been striving to cooperate with the automobile parts companies all over the world to make a win-win partnership.

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