Butylparaben
Title: Butylparaben
CAS Registry Number: 94-26-8
CAS Name: 4-Hydroxybenzoic acid butyl ester
Additional Names: n-butyl p-hydroxybenzoate
Trademarks: Butyl Chemosept; Butyl Parasept; Tegosept B
Molecular Formula: C11H14O3
Molecular Weight: 194.23
Percent Composition: C 68.02%, H 7.27%, O 24.71%
Literature References: Prepn of calcium and magnesium salts: Engels, Weijlard, US 2046324 and US 2056176 (both 1936 to Merck & Co.). Prepn of analogous derivatives: See ethyl-, methyl- and propylparaben.
Properties: Crystalline powder, mp 68-69°. Very slightly soluble in water (1:6500), glycerin; freely sol in acetone, alc, ether, chloroform, propylene glycol. Preserve in well-closed containers.
Melting point: mp 68-69°
 
Derivative Type: Calcium salt
Molecular Formula: C22H26CaO6
Molecular Weight: 426.52
Percent Composition: C 61.95%, H 6.14%, Ca 9.40%, O 22.51%
Properties: Cryst powder. Soly in water: approx 1:125.
 
Derivative Type: Magnesium salt
Molecular Formula: C22H26MgO6
Molecular Weight: 410.74
Percent Composition: C 64.33%, H 6.38%, Mg 5.92%, O 23.37%
Properties: Cryst powder. Soly in water: approx 1:110.
 
Use: Pharmaceutic aid (antifungal). Preservative in foods.

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