DL-Methionine

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INTRODUCTION

Parameters

Product	DL-Methionine
CAS No.	59-51-8
Molecular Formula	C₅H₁₁NO₂S
Molecular Weight	149.21
Structural Formula
Quality Standard	USP/EP/BP/FCC
Packing	25kg paper drum with inner double PE bags
Shelf Life	2 Years
Storage	Store in dry and cool place, and keep far away from sunlight
Specification	Standard
Appearance	White crystalline powder
Identification	The IR spectrum corresponds to that of the reference standard
Assay (on dried matter)	98.5～101.5%
Clarity of solution	Clear, colorless
pH value (1g/100mL in water)	5.6~6.1
Chloride(as Cl)	≤0.05%
Heavy metals (as Pb)	≤0.0015%
Lead (as Pb)	≤0.001%
Arsenic(as As)	≤0.00015%
Loss on drying	≤0.3%
Sulphate (SO₄^-2)	≤0.03%
Iron (as Fe)	≤0.003%
Residue on ignition (as sulphate ash)	≤0.4%
Organic volatile impurities	Meets the requirement