N,N,N',N'-TETRAMETHYLBENZIDINE
- CAS NO.：366-29-0
- Empirical Formula: C16H20N2
- Molecular Weight: 240.34
- MDL number: MFCD00008310
- EINECS: 206-676-5
- SAFETY DATA SHEET (SDS)
- Update Date: 2026-01-13 11:24:33
What is N,N,N',N'-TETRAMETHYLBENZIDINE?
Chemical properties
solid
Synthesis Reference(s)
Tetrahedron Letters, 13, p. 2193, 1972 DOI: 10.1016/S0040-4039(01)84803-6
Safety Profile
Mutation data reported. Whenheated to decomposition it emits toxic vapors of NOx.
Purification Methods
Crystallise the benzidine from EtOH or pet ether, then from pet ether/*benzene, and sublime it in a vacuum. [Guarr et al. J Am Chem Soc 107 5104 1985.] Dry it in vacuo in a drying pistol, or a vacuum line. It has m 195-196o after sublimation. [Beilstein 13 H 221, 13 I 61, 13 II 97, 13 III 429, 13 IV 368.]
Properties of N,N,N',N'-TETRAMETHYLBENZIDINE
| Melting point: | 193-195 °C(lit.) |
| Boiling point: | 373.06°C (rough estimate) |
| Density | 1.0485 (rough estimate) |
| refractive index | 1.5519 (estimate) |
| pka | 6.14±0.24(Predicted) |
| form | Fine Powder |
| color | Brownish |
| Stability: | Stable. Incompatible with acids, acid chlorides, acid anhydrides, oxidizing agents. |
| CAS DataBase Reference | 366-29-0(CAS DataBase Reference) |
| EPA Substance Registry System | [1,1'-Biphenyl]-4,4'-diamine, N,N,N',N'-tetramethyl- (366-29-0) |
Safety information for N,N,N',N'-TETRAMETHYLBENZIDINE
| Signal word | Warning |
| Pictogram(s) |
 Exclamation Mark Irritant GHS07 |
| GHS Hazard Statements |
H315:Skin corrosion/irritation H319:Serious eye damage/eye irritation H335:Specific target organ toxicity, single exposure;Respiratory tract irritation |
| Precautionary Statement Codes |
P261:Avoid breathing dust/fume/gas/mist/vapours/spray. P264:Wash hands thoroughly after handling. P264:Wash skin thouroughly after handling. P271:Use only outdoors or in a well-ventilated area. P280:Wear protective gloves/protective clothing/eye protection/face protection. P302+P352:IF ON SKIN: wash with plenty of soap and water. P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing. |
Computed Descriptors for N,N,N',N'-TETRAMETHYLBENZIDINE
N,N,N',N'-TETRAMETHYLBENZIDINE manufacturer
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product: 366-29-0 N,N,N,N-TETRAMETHYLBENZIDINE 90 % Above
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