L-Cystine Back Catalog number: 72923 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 2303.9-1G Azelaic acid, neat, Solvent-neat, Unit 1g, # of units-1, Cas.no. 123-99-9 Price on request 673055 15N3-Melamine, 10mg Price on request 92836 Dichlorobenzene Standard Price on request