product name: l-methionine
cas#63-68-3
molecular formula: c5h11no2s
molecular weight: 149.21
melting point: 276-279(dec.)
specific rotation: 23.25(c=2, 6n hcl)
water-soluble: soluble
standard: usp aji fcc
purity: 98% 99%
1.specification of our 99% l-methionine
description white crystals crystalline powder
identification conforms
state of solution ≥98.5%
specific rotation +22.4° ~ +24.7°
ph 5.6 ~ 6.1
chloride(cl) ≤0.050%
sulfate(so4) ≤0.030%
ammonium(nh4) ≤0.02%
heavy metals(pb) ≤15ppm
iron(fe) ≤30ppm
arsenic(as2o3) ≤1ppm
other amino acids conforms
loss on drying ≤0.30%
residue on ignition ≤0.10%
pyrogen conforms
assay 98.5~101.0%
2.packing: 25kg per drum or bag
3.usage of this l-methionine 99%
*methionine is an intermediate in the biosynthesis of cysteine, carnitine, taurine, lecithin, phosphatidylcholine, other phospholipids
*dl-methionine is sometimes given as a supplement to dogs; it helps keep dogs from damaging grass by reducing the ph of the urine.
*methionine is allowed as a supplement toganic poultry feed under the us certifiedganic program.
4. the advantage of l-methionine 99%
- produce under iso/gmp
- can offer more than 100 kinds:l-methionine 400mt/year,l-serine 500mt/year etc.