Megh Rasayan is one of The Best PNTOSA Supplier Company in India. Its chemical name is 4-Nitrotoluene-2-sulfonic acid. The CAS Number of Para Nitro Toluene Ortho Sulphonic Acid (PNT-OSA) is 121-03-09. It is a crystal with a gray or brown color, and its empirical formula is C 7 H7NO5S. PNTOSA is acid used for intermediating dye stuff and the most common commercial name for this product is PNTOSA.
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