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Products

Butyl Paraben U.S.P


SYSTEM MANUAL
ISSUE NO : 01
Document No.
Revision No.
Effective date
Page
QAI/Q/03/45
00
1-Aug-05
1 of 1
BUTYL PARABEN U.S.P.
 Chemical Name

Butyl 4-Hydroxy Benzoate

 Molecular Formula

C11H14O3  

 Molecular Weight

194.23


 Structural Formula

 

 CAS Number

94-26-8

 Packing

25 kg, 20 kg ( 4 x 5 kg)

 The Shelf-life

5 years

 Storage conditions and  precautions

Preserve in well-closed containers.

 Use Antimicrobial Preservative
 
NO.
Test
Observation
1.
 Description &  solubility

Small, colourless crystals or white powder.

  2.  Solubility Slightly soluble in water and in glycerin, freely soluble in acetone, in alcohol, in ether and in propylene glycol.
3.  Identification

A. Infrared Absorption <197M>  

4.  Melting Range,   °C

Between 68°Cand 72°C

5.

 Acidity

Dissolve 1.0 g in sufficient ethanol (96%) to produce 10 ml.  To 2 ml of the solution add 3 ml of ethanol (96%), 5 ml of carbon dioxide-free water and 0.1 ml of Bromocresol green solution .Not more than 0.1 ml of 0.1 N sodium hydroxide VS is required to change the colour of the solution to blue.

6.  Loss on       drying,w/w

Not more than 0.5 %.

7.  Residue on  ignition

Not more than 0.05 %.

8.  Organic volatile  impurities

Method IV <467>: meets the requirements.

9.  Assay, w/w

99.0 % - 100.5 %

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