Vadodara-based manufacturer of organic, inorganic and fine chemicals, Deepak Nitrite Ltd (DNL) has received an order from the Telangana State Pollution Control Board (TSPCB) to close one of its three manufacturing units situated at Hyderabad. The company manufactures DASDA (diamino stilbene disulfonic acid), a chemical used in the manufacturing of optical brightening agents (OBA) at its Hyderabad facility. Incidentally, the unit regarding which the order has been received happens to be a processing unit.
As a fall out to the closure order, the company’s DASDA production will be affected. The company said that it is taking all the necessary effective steps to correct the anomalies pointed out by the TSPCB authorities in the manufacturing system in the said unit at Hyderabad facility.
The chemical is used in the production of optical brightening agents (OBAs), which are used widely by the manufacturers of paper, textile and detergent. DASDA has been in short supply as key production units were closed for environmental reasons in China, which is the leading producer of this chemical in the world.
Deepak Nitrite is the only fully-integrated manufacturer of fluorescent whitening agent (FWA). This is commonly known as optical brightening agents in India having vertical integration from toluene to para-nitrotoluene (PNT) and further into DASDA and OBA.
