Butyl Paraben B.p.

Following Details of Butyl Paraben B.P. :
Chemical Name: Butyl 4-Hydroxy Benzoate
Molecular Formula: C11H14O3
Molecular Weight: 194.2

CAS Number : 94-26-8
Packing : 25 kg, 20 kg (4 x 5 kg)
The Shelf-life 5 years
Storage conditions and precautions Store in well-closed containers.
Use Antimicrobial Preservative
1.Characters
A white or almost white powder, crystalline powder or colourless crystals, very slightly soluble in water, freely soluble in methanol.

2.Identification
First identification: A, B.
Second identification: A, C, D.
A. Melts between 68A C and 71A C.
B.The infrared absorption spectrum is concordant with the reference spectrum of Ethyl paraben or with the spectrum obtained from Ethyl paraben CRS.

C.Examine the chromatograms obtained in the test for related substances. The principle spot in the chromatogram obtained with test solution (b) is similar in position and size to the principle spot in the chromatogram obtained with reference solution (b).

D.To about 10 mg in a test tube add 1 ml of sodium carbonate solution,heat to boiling for 30 seconds and cool (solution A) to a further 10mg in a test tube add 1 ml of sodium carbonate solution, the substance partly dissolves (solution B). Add at the same time to each of solutions A and B 5ml of aminopyrazolone solution R and 1 ml of potassium ferricyanide solution R and mix.