Substance profile
3,3'-dimethoxybenzidine
3,3'-dimethoxybenzidine is leaflets or needles from water.
01 · Identification
What 3,3'-dimethoxybenzidine is
3,3'-dimethoxybenzidine is leaflets or needles from water. Its molecular formula is C14H16N2O2 and its molecular weight is 244.29 g/mol. It melts at 137 °C.
Under the GHS it carries the signal word Danger. It is classed as hazardous Air Pollutants (HAPs).
Other names for 3,3'-dimethoxybenzidine
- o-dianisidine
02 · GHS classification
Hazards and label elements
Harmonised classification under CLP Annex VI. This is the legally binding classification in the EU; other jurisdictions may differ.
| Code | Hazard statement |
|---|---|
| H350 | May cause cancer <state route of exposure if it is conclusively proven that no other routes of exposure cause the hazard>. |
| H302 | Harmful if swallowed. |
Precautionary statements: P201, P270, P280, P301, P308, P312, P313, P330
03 · Physical and chemical properties
3,3'-dimethoxybenzidine properties
Every value is shown with the conditions it was measured under and the source it came from. Where sources disagree, all values are listed rather than one being picked — the difference is usually a different form of the substance, not an error.
| Property | Value | Conditions | Source |
|---|---|---|---|
| Melting point | 137 °C (278.6 °F) | HSDB | |
| 137.22 °C (279 °F) | NIOSH | ||
| 137.5 °C (279.5 °F) | ICSC | ||
| Solubility | Sol in alc, benzene, ether | HSDB | |
| Sol in chloroform, acetone | HSDB | ||
| PROBABLY SOL IN MOST ORG SOLVENTS AND LIPIDS | HSDB | ||
| Vapor pressure | negligible | ICSC | |
| Flash point | 206 °C (402.8 °F) | HSDB | |
| 206.11 °C (403 °F) | NIOSH | ||
| Lower explosive limit (LEL) | The finely powdered carcinogen is a significant dust explosion hazard. | HSDB | |
| Combustible Solid | NIOSH | ||
| Vapor density | 8.43 (air = 1) | HSDB | |
| 8.5 (air = 1) | CAMEO |
Values compiled from PubChem Laboratory Chemical Safety Summary. Temperatures converted to Fahrenheit for reference.
04 · Handling and storage
Storing and handling 3,3'-dimethoxybenzidine
Storage conditions
PRECAUTIONS FOR "CARCINOGENS": Storage site should be as close as practical to lab in which carcinogens are to be used, so that only small quantities required for ... expt need to be carried. Carcinogens should be kept in only one section of cupboard, an explosion-proof refrigerator or freezer (depending on chemicophysical properties ...) that bears appropriate label. An inventory ... should be kept, showing quantity of carcinogen & date it was acquired ... Facilities for dispensing ... should be contiguous to storage area. /Chemical Carcinogens/
Source: Hazardous Substances Data Bank (HSDB)
Incompatible materials
... Can react with oxidizing materials.
Source: Hazardous Substances Data Bank (HSDB)
Reactivity
3,3'-DIMETHOXYBENZIDINE is a weak base. Reacts exothermically with acids. Sensitive to heat, air and prolonged exposure to light.
Source: CAMEO Chemicals
Planning storage for a mix of chemicals? Check 3,3'-dimethoxybenzidine in the storage compatibility matrix →