CERTIFICATE OF ANALYSIS
Product Name L-CYSTEINE (for biochemistry) CAS Number 52-90-4
Molecular Formula C 3 H 7 NO 2 S Catalogue No. AL1613
Molecular Weight 121.16 Batch Number
Manufacturing Date December-2020 Expire Date November-2025

TYPE OF TEST

STANDARD

OBSERVED
Description
Assay
Heavy metals (as Pb)
Ammonium (NH4)
Foreign amino acids Other ninhydrine-positive
substance
Colorless crystalline powder
(Min.) 99%
<0.001%
<0.01%
<0.3%
<0.1%
Colorless crystalline powder
99.35%
<0.001%
<0.01%
0.2%
<0.1%
Result: The above product complies with LR grade

Tested By
Hitesh Kunjathur

Analysed By
Preeti Rane