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L-Cystine

Synonym(s):

L-Cystine, (Cys)₂

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About This Item

Empirical Formula (Hill Notation):
C6H12N2O4S2
CAS Number:
56-89-3
Molecular Weight:
240.30
MDL number:
MFCD00064228
UNSPSC Code:
12352209
NACRES:
NA.25

assay

≥98% (Macro-Kjeldahl method)

Quality Level

100

form

crystalline powder
crystals

optical activity

[α]20/D -218 to -224°, c = 2 in 1 M HCl

manufacturer/tradename

Calbiochem®

storage condition

OK to freeze

color

white

anion traces

chloride (Cl-): ≤0.02%
sulfate (SO42-): ≤0.02%

cation traces

As: ≤1 ppm
NH4+: ≤0.02%
heavy metals: ≤10 ppm

shipped in

ambient

storage temp.

15-25°C

InChI

1S/C6H12N2O4S2/c7-3(5(9)10)1-13-14-2-4(8)6(11)12/h3-4H,1-2,7-8H2,(H,9,10)(H,11,12)/t3-,4-/m0/s1

InChI key

LEVWYRKDKASIDU-IMJSIDKUSA-N

General description

Non-essential amino acid for human development. Has an optimal pH of 5.0-6.5.

Warning

Toxicity: Standard Handling (A)

Preparation Note

Solubility may be enhanced by lowering the pH to <2.0 or raising the pH to >8.0.

Legal Information

CALBIOCHEM is a registered trademark of Merck KGaA, Darmstadt, Germany

Storage Class

11 - Combustible Solids

wgk_germany

WGK 1

flash_point_f

Not applicable

flash_point_c

Not applicable

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

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Gregory R Kardos et al.
Frontiers in oncology, 10, 834-834 (2020-07-09)
Increased protein synthesis is a key process in melanoma, which is regulated by the ALDH18A1 gene encoding pyrroline-5-carboxylate synthase (P5CS). P5CS is involved in proline biosynthesis and targeting ALDH18A1 has previously been shown to inhibit melanoma development by decreasing intracellular

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