T8533

o-Tolidine

≥95% purity, powder or chunks

• Synonym(s): 3,3′-Dimethylbenzidine, 4,4′-Bianisidine
• Linear Formula: [-C₆H₃(CH₃)-4-NH₂]₂
• CAS Number: 119-93-7
• Molecular Weight: 212.29
• Beilstein: 2210640
• EC Number: 204-358-0
• MDL number: MFCD00014773
• UNSPSC Code: 12171500
• PubChem Substance ID: 24900539
• NACRES: NA.47

Properties

• product name: o-Tolidine, ≥95%
• Quality Level: 200
• Assay: ≥95%
• form: powder or chunks
• technique(s): titration: suitable
• color: white to light brown
• mp: 128-131 °C (lit.)
• solubility: water: slightly soluble 1.3 g/L at 25 °C
• application(s): diagnostic assay manufacturing; hematology; histology
• storage temp.: room temp
• SMILES string: Cc1cc(ccc1N)-c2ccc(N)c(C)c2
• InChI: 1S/C14H16N2/c1-9-7-11(3-5-13(9)15)12-4-6-14(16)10(2)8-12/h3-8H,15-16H2,1-2H3
• InChI key: NUIURNJTPRWVAP-UHFFFAOYSA-N

Description

General description

o-Tolidine is a diacidic dye which is sparingly soluble in water and easily soluble in ether and alcohol. On exposure to chlorine or bromine vapors, it forms an intense blue color. This forms the basis for detection of chlorine, nitrates and hydrogen peroxide in air or water. It turns yellow on reacting with free chlorine. o-Tolidine easily forms acid salts.

Application

o-Tolidine has also been used to determine the presence of laccase activity in T. versicolor fungal colonies.

Sensitive colorimetric reagent for gold and for free chlorine in water.

Warning

May be carcinogenic.

Safety Information

• Pictograms: GHS08,GHS07,GHS09
• Signal Word: Danger
• Hazard Statements: H302,H350,H411
• Precautionary Statements: P202 - P264 - P270 - P273 - P301 + P312 - P308 + P313
• Hazard Classifications: Acute Tox. 4 Oral - Aquatic Chronic 2 - Carc. 1B
• Storage Class Code: 6.1C - Combustible acute toxic Cat.3 / toxic compounds or compounds which causing chronic effects
• WGK: WGK 3
• Flash Point(F): 212.0 °F - closed cup
• Flash Point(C): 100 °C - closed cup
• Personal Protective Equipment: dust mask type N95 (US), Eyeshields, Gloves