Sadhana Nitro Chem Ltd. Manufactures Sodium Meta Nitrobenzene Sulphonic Acid. Sadhana Nitro Chem Ltd is an ISO 9001:2000 certified company. The physical properties of Sodium Meta Nitrobenzene Sulphonic Acid are off white to light yellowish colored fine powder or granules of 2-3 mm size in appearance. The purity is minimum 96.0 percent and the CAS number is 127-68-4. The molecular weight is 225.2. The Sodium Meta Nitrobenzene Sulphonic Acid is used as a mild oxidizing agent in textile printing of clothes and also in electro plating industries, and dyes.