Factory Supply N-Acetyl-L-Cysteine CAS 616-91-1

Analysis Item

Specification

Method

Result

Characters, Appearance

White Crystals or crystalline powder

Visual

White Crystals

Identification

Infrared absorption

USP 43

Conform

Specific rotation[α]D20

+21.3~+27.0°

AJI TEST1

+25.20。

State of solution   (Transmittance)

Clear and colorless≥98.0%

AJI TEST2

99.5%

Chloride(Cl)

NMT 0.04%

AJI TEST3

＜0.04%

Ammonium(NH4)

NMT 0.02%

AJI TEST4

＜0.02%

Sulfate(SO4)

NMT 0.030%

AJI TEST5

＜0.030%

Iron(Fe)

NMT 20ppm

AJI TEST6

＜20ppm

Lead

NMT 1 ppm

USP 43

＜1 ppm

Arsenic

NMT 0.5 ppm

USP 43

＜0.5 ppm

Cadmium

NMT 0.5 ppm

USP 43

＜0.5 ppm

Mercury

NMT 0. 1 ppm

USP 43

＜ 0.1 ppm

Zinc

NMT 10ppm

AJI TEST7

＜10ppm

Heavy metals(Pb)

NMT 10 ppm

AJI TEST8

＜10ppm

L-Cystine  (impurity)

NMT 0.5%

AJI TEST26

＜ 0.5%

L-Cysteine  (impurity)

NMT 0.5%

＜0.5%

N,N’-diacetyl-L-Cystine  (impurity)

NMT 0.5%

＜0.5%

N,S’-diacetyl-L-Cysteine  (impurity)

NMT 0.5%

＜0.5%

Any other impurity

NMT 0.5%

＜0.5%

Total impurities

NMT 0.5%

＜0.5%

Loss on drying

NMT 1.00%

AJI TEST11

0.12%

Residue on ignition (sulfated)

NMT 0.20%

AJI TEST13

0.06%

Assay

NLT 98.5% and NMT 101.0%

AJI TEST16

100.22%

H

2.0~2.8

AJI TEST33

2.26