o-Tolidine
SIAL/T8533 - ≥95%
Synonym: 3,3′-Dimethylbenzidine; 4,4′-Bianisidine
CAS Number: 119-93-7
Empirical Formula (Hill Notation): C14H16N2
Molecular Weight: 212.29
EC Number: 204-358-0
MDL Number: MFCD00014773
Linear Formula: [-C6H3(CH3)-4-NH2]2
Product Type: Chemical
This picture is provided solely for illustration purposes. Optical properties of the actual product may deviate. Relevant product information is printed on labeled products and other accompanying or available information material. This image depicts SKU: T8533-100G
This picture is provided solely for illustration purposes. Optical properties of the actual product may deviate. Relevant product information is printed on labeled products and other accompanying or available information material. This image depicts SKU: T8533-25G
| application(s) | diagnostic assay manufacturing hematology histology |
| assay | ≥95% |
| color | white to light brown |
| form | powder or chunks |
| InChI | 1S/C14H16N2/c1-9-7-11(3-5 |
| InChI key | NUIURNJTPRWVAP-UHFFFAOYSA |
| mp | 128-131 °C (lit.) |
| Quality Level | 200  |
| SMILES string | Cc1cc(ccc1N)-c2ccc(N)c(C) |
| solubility | water: slightly soluble 1.3 g/L at 25 °C |
| storage temp. | room temp |
| technique(s) | titration: suitable |
| Application: | o-Tolidine has also been used to determine the presence of laccase activity in T. versicolor fungal colonies. |
| Application: | Sensitive colorimetric reagent for gold and for free chlorine in water. |
| Disclaimer: | May be carcinogenic. |
| 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. |
| Packaging: | 25, 100 g in glass bottle |
| Symbol |    GHS07,GHS08,GHS09 |
| Signal word | Danger |
| Hazard statements | H302 - H350 - H411 |
| Precautionary statements | P202 - P264 - P270 - P273 - P301 + P312 - P308 + P313 |
| Hazard Codes | T,N |
| Risk Statements | 45-22-51/53 |
| Safety Statements | 53-45-61 |
| RIDADR | UN 3077 9 / PGIII |
| WGK Germany | WGK 3 |
| Flash Point(F) | 212.0 °F - closed cup |
| Flash Point(C) | 100 °C - closed cup |
| Purity | ≥95% |
| mp | 128-131 °C (lit.) |
| Storage Temp. | room temp |
| UNSPSC | 12171500 |