1,3-Diaza-2,4-cyclopentadiene, Glyoxaline

C3H4N2
M.W.：68.08
White or pale yellow solid

Application (for molecular biology)
Excellent for buffers in the range of pH 6.2-7.8.
Used as an antimetabolite and as an inhibitor of histamine. Also has many synthetic uses.

Solubility: Imidazole is soluble in water (approximately 500 mg/ml), yielding a clear solution.

Store at a cool, dry place. Store in a tightly close container.
Hazards
Harmful if swallowed. Causes burns. Potential Health Effects. 

For Microbiology Culture Inducer, Dioxane Completely Free!

IsoPropyl-b-D-ThioGalactopyranoside
C₉H₁₈O₅S
M.W.: 238.3
Assay (HPLC): 99% Min.
Purity (TLC): Single Spot
Purity (HPLC): 99.9%
pH (5% in water): 6.3
Dioxane (GLC): <1ppm
Melting Point: 114℃-115℃
Solubility (5% in water): Clear and Colorless

The most commonly used synthetic inductor of the Lac operon is IPTG since it is both active at very low concentrations and not subject to enzymatic degradation.

Stock Conc.: Dissolve 100mM or 500mM IPTG in water or buffer, sterilize by filtration through a 0.22um filter and store at -20°C.
Working Conc.: 0.1-1mM

Yansura, D.G. & Henner, D.J. (1984) Proc. Natl. Acad. Sci. USA 81, 439-443
Use of the E.coli lac repressor and operator to control gene expression in B. subtilis.
Cho, S. et al. (1985) Biochem. Biophys. Res. Com. 128, 1268-1273
Effect of IPTG concentration on the level of Lac operon induction in steady state E. coli.

Store at -20℃. Protect from light.