Tolidine (O-tolidine) | 119-93-7

Description :

Tolidine Supplier & Distributor in India

ChemicalBull is a reliable Tolidine supplier, distributor, wholesaler and exporter in India, supporting dye and pigment companies, specialty chemical manufacturers, resin formulators and industrial laboratories. We provide B2B supply support with suitable packing, technical documents and coordinated delivery.

Tolidine, commonly known as O-Tolidine, is an aromatic diamine mainly used as a chemical intermediate in the production of selected dyes, pigments and specialty organic compounds. Its standard chemical name is 3,3'-Dimethylbenzidine. The product requires strict industrial handling because it is recognised as a hazardous aromatic amine.

ChemicalBull supports buyers with COA, MSDS, TDS, purity details, packing information and commercial quotations. Buyers can share their required grade, quantity, intended industrial use and delivery location for suitable supply information.

Overview of Tolidine

O-Tolidine is an aromatic organic compound containing two amino groups and two methyl groups attached to a biphenyl structure. Its CAS number is 119-93-7, molecular formula is C₁₄H₁₆N₂ and molecular weight is approximately 212.29 g/mol.

The product is also known as 3,3'-Dimethylbenzidine, Orthotolidine and 3,3'-Dimethyl-[1,1'-biphenyl]-4,4'-diamine. Commercial material may appear as white, light tan or reddish crystals or crystalline powder.

Tolidine has historically been used as an intermediate for azo dyes and organic pigments. It has also been used in analytical chemistry, although modern handling and use require strong safety controls because of its toxicological profile.

Applications of Tolidine

Azo Dye Intermediates

O-Tolidine is mainly used as an intermediate for producing selected azo dyes. Its two aromatic amino groups allow it to participate in diazo-based colour chemistry used to prepare different colourants.

Historically, O-Tolidine-derived dyes have been used in textile, leather and paper-related applications.

Organic Pigment Production

Tolidine is used as a raw material for selected organic pigments, including diarylide-type pigment chemistry. These pigments may be used in industrial colour systems after complete conversion into the finished pigment.

One important O-Tolidine derivative is used as a coupling component for producing yellow colour shades.

Printing Ink Pigments

Pigments produced from Tolidine-based intermediates may be used in printing ink formulations where strong colour and suitable dispersion are required.

Tolidine itself is an intermediate and should not be described as a ready-to-use printing ink colourant.

Coating and Paint Pigments

Tolidine-derived pigment chemistry may also be used in selected industrial paints and coatings. The finished pigment provides the colour function, while Tolidine serves as an upstream raw material.

Suitability depends on the final pigment grade, coating resin and regulatory requirements.

Specialty Chemical Intermediates

O-Tolidine may be used as a starting material for selected specialty organic compounds. PubChem notes derivatives used in colour chemistry and crosslinking-related chemical applications.

The exact suitability depends on the chemical process, purity requirement and finished-product specification.

Analytical and Laboratory Use

O-Tolidine has historically been used as a colour-forming reagent in analytical chemistry, including methods for chlorine and certain metal determinations. Because safer alternatives are now available for many applications, use should follow current laboratory regulations and exposure-control requirements.

Tolidine Supply Support for B2B Buyers

ChemicalBull supports verified industrial buyers with:

• Purity and grade confirmation

• Bulk and recurring quantity enquiries

• Batch-specific Certificate of Analysis

• MSDS or SDS documentation

• Technical Data Sheet

• Appearance and melting-range information

• Suitable chemical-resistant packing

• Commercial quotation and delivery planning

• Domestic and permitted export support

Buyers should mention their required purity, quantity, industrial application, packing preference and delivery destination.

Why Choose ChemicalBull for Tolidine?

ChemicalBull helps B2B buyers source Tolidine according to their actual industrial requirements. Our team reviews the required purity, application, quantity, packing and documentation before confirming a suitable supply option.

This is especially important for O-Tolidine because product identity, impurity limits and handling requirements must be clearly verified before procurement. ChemicalBull supports buyers with batch specifications, COA, MSDS and TDS information for informed purchasing.

We also provide commercial pricing, packing coordination and delivery support for approved industrial requirements.

Quality, Compliance and Safety Note

O-Tolidine is a hazardous aromatic amine and requires strict exposure control. Current safety documentation classifies it as a chemical of significant health concern, and NIOSH lists a very low recommended occupational exposure ceiling.

Industrial users should avoid skin contact, inhalation of dust and uncontrolled workplace exposure. Fisher Scientific's current SDS advises against food, drug, pesticide and biocidal uses for its laboratory-grade material.

Buyers are responsible for confirming that purchase, use, storage and disposal comply with applicable Indian occupational, chemical and environmental regulations.

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Source Tolidine with Specification and Safety Support

Need O-Tolidine for approved dye, pigment or specialty chemical production?

Share your required purity, monthly quantity, intended industrial use, packing preference and delivery location with ChemicalBull. Our team will review availability and provide technical documents, specifications and commercial terms.

Connect with ChemicalBull for a Tolidine supply option backed by clear specifications and responsible B2B handling support.

Frequently Asked Questions

1. What is Tolidine?

   Tolidine, commonly called O-Tolidine, is an aromatic diamine used mainly as an intermediate in dye, pigment and specialty chemical production.
   
   

2. What is the synonym of Tolidine?

   The main synonym is O-Tolidine. It is also known as 3,3'-Dimethylbenzidine.
   
   

3. What is the CAS number of O-Tolidine?

   The CAS number is 119-93-7.
   
   

4. Does ChemicalBull supply Tolidine in bulk?

   ChemicalBull supports B2B enquiries for approved industrial requirements, subject to availability, documentation and applicable compliance requirements.
   
   

5. Which documents are available?

   COA, MSDS, TDS and available product specifications may be provided according to the supplied grade.

6. What details are required for a quotation?

7. Share the required purity, quantity, application, packing preference, company details and delivery location.