USD $100.00-100.00 / Kilogram
USD $10.00-90.00 / Kilogram
USD $8.80-8.80 / Gram
USD $10.00-90.00 / Kilogram
USD $2.00-2.00 / Gram
USD $1.00-10.00 / Kilogram
USD $2.00-2.00 / Gram
USD $2.00-2.00 / Gram
1.good quality
2.best service
3.low price
appearance |
white crystal or crystalline powder |
assay (dried substance), % |
98.5~ 101.0 |
specific rotation[α]d20 |
-84.5°~ -86.0° |
transmittance, % |
≥98.0 |
chloride (cl), % |
≤0.020 |
sulfate (so4), % |
≤0.020 |
ammonium salt (nh4), % |
≤0.020 |
iron (fe) |
≤10ppm |
heavy metals (pb) |
≤10ppm |
arsenic (as) |
≤1ppm |
lead |
≤3ppm |
cadmium |
≤1ppm |
mercury |
≤0.1ppm |
other amino acids |
negative |
loss on drying, % |
≤0.30 |
residue on ignition(sulfated), % |
≤0.10 |
ph |
5.9~ 6.9 |
total plate count |
≤1000cfu/g |
yeast and molds |
≤100cfu/g |
salmonella |
negative |
e.coli |
negative |
identification |
meets the ir requirement |