Tiron free acid

Tiron A colorimetric reagent for iron, manganese, titanium, molybdenum, and complexes of zirconium. (From Merck Index, 11th ed)

Molecular Formula: C₆H₆O₈S₂

InChI: InChI=1/C6H6O8S2/c7-4-1-3(15(9,10)11)2-5(6(4)8)16(12,13)14/h1-2,7-8H,(H,9,10,11)(H,12,13,14)/f/h9,12H

InChIKey: InChIKey=XXAXVMUWHZHZMJ-ULJANMDQCS
SMILES: C1=C(C=C(C(=C1S(=O)(=O)O)O)O)S(=O)(=O)O

Names:
    Catechol-3,5-disulfonic acid
    EINECS 205-742-0
    m-Benzenedisulfonic acid, 4,5-dihydroxy-
    Pyrocatechol-3,5-disulfonic acid
    Tiron free acid
    1,3-Benzenedisulfonic acid, 4,5-dihydroxy- (9CI)
    149-45-1
    3,5-Disulfopyrocatechol
    4,5-dihydroxybenzene-1,3-disulfonic acid
    4,5-Dihydroxybenzene-1,3-disulphonic acid
    4,5-Dihydroxy-1,3-benzenedisulfonic acid

Registries:
    PubChem CID 9002
    PubChem ID 209480