L-Alanyl-L-cystine
L-Alanyl-L-cystine (CAS No. 115888-13-6) is a white crystalline dipeptide composed of alanine and cystine, with a molecular weight of 382.5 g/mol and a purity of 99% min. It is commonly used in cell culture media and pharmaceutical development, especially in serum-free environments where a reliable cystine source is essential.
By providing a more stable and soluble form of cystine, this compound helps support antioxidant mechanisms and promotes cellular growth under nutrient-limited conditions. It should be stored at 2–8 °C in sealed containers to preserve quality. It is available in 25 kg fibre drums, with a monthly output of up to 1 ton to ensure stable supply for ongoing research and production needs.
- CAS No.: 115888-13-6
- Molecular Formula: C₁₂H₂₂N₄O₆S₂
- Purity: 99% min
- Appearance White crystalline powder
- Molecular Weight 382.5 g/mol
- Density 1.4 ± 0.1 g/cm³
- Boiling Point 751.7 ± 60.0 °C at 760 mmHg
- Melting Point N/A
- Flash Point 408.4 ± 32.9 °C
- Packaging 25 kg per fibre drum
- Storage Conditions 2–8 °C
- Product Name
- L-Alanyl-L-Cystine;
- (2R,2'R)-3,3'-Disulfanediylbis(2-((S)-2-aminopropanamido)propanoic acid);
- (2R)-2-[(2S)-2-aminopropanamido]-3-{[(2R)-2-[(2S)-2-aminopropanamido]-2-carboxyethyl]disulfanyl}propanoic acid
- Production capacity 1 ton/month
- Applications Raw material for cell culture media, API intermediate
Is L-Alanyl-L-cystine suitable for serum-free cell culture?
Yes. L-Alanyl-L-cystine is used in serum-free cell culture as a dipeptide-based source of cystine. It supports antioxidant function and promotes cell growth and viability in environments where serum is absent or reduced, making it valuable in defined media formulations.