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Products

Ethyl Paraben U.S.P


SYSTEM MANUAL
ISSUE NO : 01
Document No.
Revision No.
Effective date
Page
QAI/Q/03/43
00
1-Aug-05
1 of 1
ETHYL PARABEN U.S.P.
Chemical Name

Ethyl Hydroxy Benzoate

 Molecular Formula

C9H10O3

 Molecular Weight

166.2


 Structural Formula

 

 CAS Number

120-47-8

 Reference

USP-25 / NF 19

 Packing

25 kg, 20 kg(4 x 5kg)

 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 115°Cand 118°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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