Product Name:DL-Methionine

Lots Quantity:5000KG

Batch No:2012102003

MFG date:2012.10.20

Date of Analysis:2012.05.20

Expiry date: 2014.10.19

Reference standard:USP24

Partical size 60-80mesh

Item

Specifications

Results

Appearance

White crystalline powder

White crystalline powder

Solubility

Soluble in water, very slightly soluble in 80% ethanol and methanol after 30 minute sonication.

Soluble in water,very slightly soluble in 80% ethanol and methanol after 30 minute sonication.

Assay,% (on ODB)

99.00%-101.00%

99.66% as is 99.93% on ODB

Identification

IR

Positive

,%

Transmittance,%

Not less than 98.0%

98.57%

pH value (2.0% aqueous solution)

5.60 to 6.10

6.05

Melting point

About 270.00°C

261.2°C

Sulphated Ash

0.10% maximum

0.03%

Appearance of solution

Clear and colorless

Clear

Optical rotation

-0.05°C to +0.05°C

0.00°C

Sieve test

80 mesh -45% through minimum

80 mesh-49.10% through

100 mesh -75% on minimum

100 mesh -78.48% on

Conclusion :This product conforms to requirements of USP24 standard.