o-Tolidine

Name: o-Tolidine
Brand: Vaqora Chemicals
SKU: VQ-000662

About o-Tolidine

Listed under CAS 119-93-7, o-Tolidine is a biological stain available from Vaqora Chemicals. The compound has the formula C14H16N2, corresponding to a molecular weight of 212.29 g/mol. Its systematic (IUPAC) name is 4-(4-amino-3-methylphenyl)-2-methylaniline. It is also known as 3,3'-Dimethylbenzidine or 4,4'-Bianisidine.

In its supplied form it is a light brown to brown liquid. Store in a cool, well-ventilated place, away from sources of ignition, with the container tightly sealed. Under GHS it is labelled “Danger”, so handle it with suitable PPE and consult the SDS.

Typical applications include histology and cytology staining, microscopy and clinical laboratories. Our customers for this product work in academic and industrial research, diagnostics and biotechnology and textiles and dyeing.

We offer o-Tolidine in 500 mL and 5 L packs with a batch-specific COA, and ship to customers worldwide.

Typical applications

Histology & cytology staining
Microscopy
Clinical laboratories

Industries

Specifications & identifiers

Chemical identifiers
Product name	o-Tolidine
Catalogue No.	VQ-000662
CAS Number	119-93-7
IUPAC name	4-(4-amino-3-methylphenyl)-2-methylaniline
Molecular formula	C₁₄H₁₆N₂
Molecular weight	212.29 g/mol
Exact mass	212.1313
HSN code	29214330
InChIKey	NUIURNJTPRWVAP-UHFFFAOYSA-N
SMILES	CC1=C(C=CC(=C1)C2=CC(=C(C=C2)N)C)N
PubChem CID	8413

Physical properties
Physical form	Liquid
Appearance	Light brown to brown liquid
LogP (XLogP3)	2.3
H-bond donors / acceptors	2 / 2
TPSA	52 Å²
UN number	UN 3077
Synonyms	3,3'-Dimethylbenzidine, 4,4'-Bianisidine, Orthotolidine, Diaminoditolyl, 2-Tolidine, Bianisidine, Diaminotolyl, 4,4'-Bi-o-toluidine, 3,3'-Tolidine, Fast Dark Blue Base R, 3,3'-Dimethyl-4,4'-biphenyldiamine, 3,3'-Dimethyl-4,4'-diaminobiphenyl

Safety & hazard information (GHS)

Harmful / irritant

Health hazard

Environmental hazard

Signal word: Danger

Hazard statements

H302Harmful if swallowed
H350May cause cancer
H411Toxic to aquatic life with long lasting effects

Precautionary statements: P203, P264, P270, P273, P280, P301 + P317, P318, P330, P391, P405, P501

Classification is indicative (aggregated GHS notifications) and may vary by grade and concentration. Always refer to the SDS supplied with your lot.

Documents

Safety Data Sheet (SDS)16-section GHS · on request Certificate of AnalysisTypical / batch COA · on request Specification sheetTDS / MOA · on request

Other grades of CAS 119-93-7

Synthesis

o-Tolidine, 98%

CAS: 119-93-7
Formula: C₁₄H₁₆N₂
MW: 212.29 g/mol

VQ-000664

AR

o-Tolidine, GR 99%+

CAS: 119-93-7
Formula: C₁₄H₁₆N₂
MW: 212.29 g/mol

VQ-000665

Frequently asked questions

What is the CAS number of o-Tolidine?

The CAS Registry Number of o-Tolidine is 119-93-7. It is also known as 3,3'-Dimethylbenzidine, 4,4'-Bianisidine, Orthotolidine.

What is the molecular formula and molecular weight of o-Tolidine?

o-Tolidine has the molecular formula C14H16N2 and a molecular weight of 212.29 g/mol. Its IUPAC name is 4-(4-amino-3-methylphenyl)-2-methylaniline.

Which grade and pack sizes of o-Tolidine can I order?

We supply o-Tolidine, in 500 mL, 5 L packs. Larger bulk quantities and custom packing are quoted on request.

Do you provide a COA and SDS with o-Tolidine?

Yes. Every lot of o-Tolidine is shipped with a batch-specific Certificate of Analysis, and a 16-section GHS Safety Data Sheet is provided with the quotation and the shipment.

Can o-Tolidine be shipped internationally?

Yes. o-Tolidine is classified as hazardous (UN 3077), so it is packed in UN-approved packaging and shipped as dangerous goods under IATA/IMDG rules. We export worldwide on EXW, FOB, CIF and DAP terms.