| NAME |
DL
Methionine B.P. / E.P. |
| CHEMICAL FORMULA |
C5H11NO2S |
Molecular Weight : 149.21 |
| CAS NUMBER |
59-51-8 |
| USE |
Food additives / essential amino
acid / nutritional
supplement. |
| DESCRIPTION |
Almost white, crystalline powder
or small flakes. |
| CHEMICAL SPECIFICATION |
TESTS |
SPECIFICATIONS |
| |
Solubility |
Sparingly soluble in water, very slightly soluble
in alcohol, practically insoluble in ether.
It dissolves in dilute acids and in dilute solutions
of the alkali hydroxides. |
| |
Identification |
A,B,C & D are +ve. |
| |
Melting Point |
About 270°C. |
| |
Appearance of Solution |
2 % w/v solution is clear and colourless. |
| |
pH |
5.4 to 6.1 |
| |
Related Substances |
Any secondary spot obtained with solution (a)
is not more intense than the spot with referred solution (b)
(0.2 %). |
| |
Chloride |
NMT 200 ppm. |
| |
Sulphates |
NMT 200 ppm. |
| |
Heavy Metals |
NMT 20 ppm. |
| |
Loss on drying |
NMT 0.5 % |
| |
Sulphated ash |
NMT 0.1 % |
| |
Assay
(on dried basis) |
99.0 % to 101 % of C5H11NO2S |
| PACKAGING |
25 Kgs Blue HDPE Drum. |
| STORAGE |
Store in cool, dry place in well-closed
containers. |
| |
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