We are offering an effective range of 4, 4 Dintro Stilbene 2, 2, Disulphonic Acid (Dnsda) that is processed using quality raw material that is procured from reliable vendors. These are formulated by the process of by oxidation of 4-nitrotoluene-2-sulphonic acid with an oxidant in the presence of strong bases is characterized in that the oxidation is carried out in a mixture of water and an organic solvent selected from the group consisting of alcohols, ethers and mixtures. Following are the specifications: 

• Molecular weight: 430/474 as sodium salt
• Empirical formula: C₁₄ H₈ O₁₀ N₂ S₂ NA₂
• Insoluble: 0.5% max
• Appearance: Pale yellow
• Purity: 75%
• CAS no: 128-42-7

We are offering an effective range of Aniline 2, 5- Disulfonic Acid with empirical formula C₆H₇N S₂O₆. This chemical is also known as 2-amino 1, 4-benzenedisulphonic acid 2, 5 disulfoaniline 4-sulphometanilic acid and is widely used in textile, paper and detergent industries. The chemical is used as intermediate for optical brightening agents and for dyes like Direct Blue 70, 78, 82, 83, Direct Black 77, Direct Green 20, Direct Red 103, Film Orange P (by), Mordant Azoles Printing Bordeaux B and Pigment Saturn Yellow 5 GL.

Specifications:

• CAS no.: 98 - 44 - 2

• Purity (amine value of free acid): 80 % minimum

• Purity (amine value of Sodium Salt): 87 % minimum

• Molecular weight (as free acid): 253 gm/mol

• Molecular weight (as sodium salt): 275.5 gm/mol

• Appearance: Moist white powder

• Insoluble: 0.15 % maximum

• Free acid content: 4 % maximum

• Moisture content (by K.F. method): 5 % approx

• Metallic acid content: < 0.5 %

• Isometric Impurities: Nil

• Basis of sale: Real content (100% basis) on M.W. 253

• Packing: 25 Kg / 50 Kg HDPE woven bags with PE liner / jumbo bags

We are offering a quality range of Resist Salts in granules as well as in powdered form with CAS no. - 127-68-4. It is in a white powder form and is free from dust particles and other impurities. This salt is a principal dye intermediate that is used in the manufacture of Amino Anthraquinone & Benzene di sulphonic acid & oxidizing.

We are offering an effective range of Sulphanilic Acid that is widely used in the production process of food colours, acid dyes, reactive dyes, ramazol dyes, metal complex dyes and direct dyes. These acids are available with CAS no. - 121-57-3 and are widely appreciated for accurate composition and precise pH value.