Methyl Paraben

 

DESCRIPTION

INCI Adopted Name: Methyl Paraben
CAS Registry No.: 99-76-3
Molecular Formula: C8H8O3
Molecular Weight: 152.15
Structural Formula:
Synonyms: Methyl p-Hydroxybenzoate;

Methyl 4-hydroxybenzoate
4-Hydroxybenzoic acid, methyl ester

SPECIFICATIONS

Item Index
Q/SH008-2014/ BP/ USP
Appearance Colorless crystal or white crystalline powder
Content (dry basis)% Min. 99.0
Melting point ℃ 125-128
Acidity Qualified
Sulfate (SO42-) %max. 0.024
Drying loss %max. 0.50
Residue on ignition %max. 0.1
P-hydroxybenzoic acid and salicylic acid %max. 0.1
Related substances Qualified
Identification test Qualified

PROPERTIES

Appearance :white crystal.
Solubility: Easily soluble in diethyl ether, acetone. Very slightly soluble in cold water, hot water. 1 gram dissolves in about 40 ml of warm oil. 1 gram dissolves in about 70 ml of warm glycerol. Slightly soluble in carbon tetrachloride. Soluble in benzene, oils and fats. Solubility in water: 0.25% (wt/wt) @20 deg. C or 0.30% (wt/wt) @ 25 deg.C

PACKAGING
Standard packaging includes the following:
25kg per drum, 25kg/carton
Other package sizes are available upon request.

STORAGE
Store in a well-ventilated, cool, dry area, out of direct sunlight. Keep containers tightly closed when not in use.

PERIOD OF VALIDITY
36 months

FEATURE AND APPLICATION

Broad spectrum bactericide for gram positive, feminine germ and saccharomycetes;
Low application concentration, safe, economic, long serve life;
Recommended dosage: 0.2%~0.5%
It is widely used in cosmetic, medical and food industry for preservation.