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Toluhydroquinone THQ (CAS 95-71-6) is a tan to white crystalline solid. THQ
undergoes chemical reactions similarto those of hydroquinone. The presence of a methyl group in the ortho position in the toluhydroquinone molecule accounts for the slight structural and behavioral differences between toluhydroquinone and hydroquinone. Toluhydroquinone is a highly active inhibitor in the free radical polymerization of vinyl monomers and unsaturated polyesters.
Specification of Toluhydroquinone THQ
Appearance
White Crystal Powder
Assay, % (dry basis)
≥ 99.0
Melting point, ℃
125-128
Residue on ignition,%
≤ 0.04
Heavy Metals,%
≤ 0.001
Loss on drying,%
≤ 0.5
Absorptions K
≤ 1.8(λ =440nm)
≤ 1.1(λ =520nm)
≤ 0.5(λ =750nm)
Application of Toluhydroquinone THQ
Toluhydroquinone is a highly active inhibitor in the free radical polymerization of vinyl monomers and unsaturated polyesters.--Antioxidant
--Catalyst in the oxidation of mercaptans
--Catalysts
--Photographic developers
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