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D-Cysteine hydrochloride monohydrate
D-Cysteine hydrochloride monohydrate

D-Cysteine hydrochloride monohydrate CAS# :32443-99-5 Assay:99.8% M.F.:C3H7NO2S.HCI.H2O M.W.:175.64

D-Cysteine hydrochloride monohydrate

CAS# :32443-99-5 Assay:99.8% M.F.:C3H7NO2S.HCI.H2O M.W.:175.64

 

 

 

Technical index

Standards

Test results

Characters

White crystals or crystalline powder

conforms

Identification

Should show respond 

conforms

Specific rotation

-5.5°~ -7.00°

-6.36 °

Chloride(Cl)

Not more than 0.04 %

Less than 0.05 %

Sulfate(SO4)

Not more than 0.030 %

Less than 0.030 %

Iron(Fe)

Not more than 20ppm

Less than 20ppm

Heavy metals(Pb)

Not more than 10ppm

Less than 10ppm

Loss on drying

8.0-12.0%

10.79 %

Residue on ignition

Not more than 0.10 %

0.08%

Other amino acid

Not more than 0.5%

Less than 0.5%

Ammonium(NH4)

Not more than 0.01%

Less than 0.01%

Melting point

106  to 110°C

108.0

The aqua’s clearness

Degree and color

Smaller and yellow No.3 of smaller NO.2 of muddy degree ,color degree

conforms

Assay

98.5 ~ 101.0 % (dried basis)

99.31 %

Conclusion

Comply with EP5

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D-Cysteine hydrochloride monohydrate

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