Para Nitrotoluene Ortho Sulphonic Acid
Supplier in Dubai & UAE

Para Nitrotoluene Ortho Sulphonic Acid is used as the starting material for 4,4′-diaminostilbene-2,2′-disulfonic acid (DSD acid), for fluorescent whitening agents used in detergents, paper and textiles, for direct and stilbene dyes, and in specialty chemical synthesis.

The CAS number of Para Nitrotoluene Ortho Sulphonic Acid is 121-03-9. Its molecular formula is C₇H₇NO₅S and its molecular weight is 217.20 g/mol.

Para Nitrotoluene Ortho Sulphonic Acid (CAS 121-03-9) is also sold as 4-Nitrotoluene-2-sulfonic acid, 4-Nitrotoluene-2-sulphonic acid, 2-Methyl-5-nitrobenzenesulfonic acid, PNTOSA. Please mention the CAS number in your enquiry so we quote the right material.

Chelora Chemicals UAE is a B2B chemical supplier and distributor of Para Nitrotoluene Ortho Sulphonic Acid, serving Dubai, Abu Dhabi, Sharjah, Ajman, Ras Al Khaimah, Fujairah and Umm Al Quwain, with full COA, SDS and TDS documentation and export to the wider GCC.

Yes. We deliver to all seven Emirates, including Jebel Ali and JAFZA in Dubai, KEZAD, Musaffah and Khalifa Port in Abu Dhabi, and SAIF Zone and Hamriyah Free Zone in Sharjah, as well as RAKEZ, Ajman Free Zone and Fujairah.

Our standard grade is ≥ 95.0% by HPLC / titration as per the COA. Specific limits on moisture, isomers, colour or other impurities can be sourced on request to suit your process.

Para Nitrotoluene Ortho Sulphonic Acid (4-nitrotoluene-2-sulfonic acid, CAS 121-03-9) is different from its parent Para Nitrotoluene (CAS 99-99-0), which carries no sulfonic acid group, and from the final stilbene product DSD acid. Please quote the CAS number in your enquiry so we supply the right material.

Share the grade, quantity, packing, Incoterm and delivery Emirate through our contact page and our team aims to respond within one business day.

It is typically supplied in 25 kg liner-sealed bags or fibre / steel drums, with larger bulk bags and smaller packs available for trials. Packaging is sealed and labelled for safe dangerous-goods transport.

The minimum order depends on packing and availability. We handle everything from a few drums or small packs for trials and lab qualification up to full container loads and ISO tanks.

Store in tightly closed containers in a cool, dry, dark and well-ventilated area, away from direct sunlight, strong oxidisers, strong bases and reducing agents. Keep away from heat and ignition sources and handle in line with the SDS.

Yes. Para Nitrotoluene Ortho Sulphonic Acid can cause skin and serious eye irritation or damage, may irritate the respiratory tract and is harmful if swallowed. Solutions are acidic and corrosive to many metals. Use suitable gloves, goggles and ventilation and follow the SDS supplied with the product.

Yes. We export from the UAE to Saudi Arabia, Oman, Qatar, Kuwait, Bahrain, East and West Africa, South Asia and other markets on EXW, FOB, CFR, CIF, DAP or DDP terms, subject to the import rules of each destination.

Yes. Samples are available for qualification on request, together with the COA and SDS, so your QC or R&D team can approve the material before a commercial order.