High quality D-Biotin 99% with best price

item

standard

result

appearance

white or almost white crystalline powder

conform

identification

the retention time of sample in the main peaks correspond to that of the ref.standard

conform

ir should conform

conform

specific rotation

+89.0～+93.0°

+91.4°

loss on drying

≤0.4%

0.06%

related substances

any single impurity≤1.0%

＜0.1%

total impurities≤2.0%

＜0.1%

residual solvents

toluene≤100ppm

＜10ppm

benzene≤2ppm

＜0.5ppm

dmso≤5000ppm

＜500ppm

total plate count

≤1000cfu/g

not detected

yeasts & moulds

≤100cfu/g

not detected

e-coli

not detectable / 1g

not detected

staphylococcus aureus

not detectable / 1g

not detected

pseudomonas aeruginosa

not detectable / 1g

not detected

enterobacteria

not detectable / 1g

not detected

salmonella

not detectable / 10g

not detected

assay

97.5～100.5%

99.2%

conclusion

this product conforms to usp39 & in-house standard.