Methylparaben
Title: Methylparaben
CAS Registry Number: 99-76-3
CAS Name: 4-Hydroxybenzoic acid methyl ester
Additional Names: methyl p-hydroxybenzoate
Trademarks: Nipagin M; Tegosept M; Methyl Chemosept; Methyl Parasept (Tenneco)
Molecular Formula: C8H8O3
Molecular Weight: 152.15
Percent Composition: C 63.15%, H 5.30%, O 31.55%
Literature References: Prepn: Ladenburg, Fitz, Ann. 141, 247 (1867); Zbarskii, C.A. 33, 93123 (1939). Identification in the vaginal secretions of female dogs in estrus: M. Goodwin et al., Science 203, 559 (1979).
Properties: White needles, mp 131°. bp 270-280° (dec). One gram dissolves in 400 ml water, 40 ml warm oil, about 70 ml warm glycerol; freely sol in alcohol, acetone, ether. The soly in water is also given as 0.25% w/w at 20°, and as 0.30% w/w at 25°.
Melting point: mp 131°
Boiling point: bp 270-280° (dec)
Use: As preservative in foods, beverages and cosmetics.

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