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1 Kilogram |
Negotiable |
Methionine DL-Methionine 59-51-8
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Appearance | White Crystal to Powder |
Infrared spectrometry | Conforms to Structure |
Purity | ≥99% (NT) (TLC) |
Loss on drying | <0.2 % |
Heavy metals (as Pb) | <10 ppm |
Res. after ignition | <0.1 % |
pH | 5.6 ~ 6.1 (1% soln.25°C) |
Transmittance | >95 % (c=10, 2 N HCl, 430 nm) 1 cm cell |
Cl | < 200 ppm |
SO4 | < 200 ppm |
NH4 | < 200 ppm |
Fe | < 10 ppm |
Other amino acids | <0.2 % (TLC) |
Water (by Karl Fischer) | ≤0.5 % |
Residue on ignition (Ash) | ≤0.1 % |
Arsenic (As) | ≤3 ppm |
Cadmium (Cd) | ≤1 ppm |
Mercury (Hg) | ≤1 ppm |
Lead (Pb) | ≤10 ppm |
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