SODIUM THIOSULFATE, Pentahydrate, Reagent Grade STS804 CAS number: [10102-17-7] Na2S2O3.5H2O MW: 248.2 Purity: min. 99.5% Insolubles: < 0.005% Heavy Metals (as Pb): < 0.001% Solubility (1 M): clear/colorless

URACIL, Ultra Pure CAS number: [66-22-8] C 4 H 4 N 2 O 2 MW: 112.09 Purity: > 99.0%

DL-MALIC ACID CAS number: [617-48-1] C 4 H 6 O 5 MW: 134.09 Purity: > 99%

p-AMINOBENZOIC ACID (PABA), Free Acid PAB222 (Vitamin BX, Vitamin H1) Suitable for cell culture C7H7NO2 MW: 137.1 Purity: min. 99% Color: white powder Solubiltiy: 2% water

DL-ALANINE ALA202 C3H7NO2 MW 89.09 Purity: >99%

L-CYSTEINE, HCL Monohydrate CAS number: [7048-04-6] Synthetic C 3 H 7 NO 2 S . HCl . H 2 O MW: 175.63 Purity: ≥ 98.0% Heavy Metals: < 0.0015%

BRILLIANT GREEN, Certifiable Grade CAS number: [633-03-4] Malachite Green G C 27 H 34 N 2 O 4 S MW: 482.6 Dye content: ≥ 85%

POLYVINYLPYRROLIDONE High Purity Grade CAS number: [9003-39-8] Purity: > 99.0% pH (5%, H 2 O): 3.0 - 7.0 Heavy Metals (as Pb): < 0.001% MW: avg. 40,000 Viscosity: 26-35 K A component of Denhardt's Solution. Use for hybridization at concentration of 1% (w/v) for a 50X solution. Useful as a solubilizer and complexing agent in plant cell culture.

L-SERINE SER333 CAS number: [56-45-1] C3H7NO3 MW: 105.1 Purity: > 99%