Hydroquinone(HQ)
2.Photographic Grade,Technical Grade
3.Cas no.:123-31-9
4.white or off-white powdery crystal
5.25kgs/ bag
hydroquinone for face cream
(1) Photographic Grade
Molecular Formual: 1,4-C6H4(OH)2
Molecular weight: 110.12 (According to the international atomic weight of 1987)
Specification: Content: 99% - 101%
Usage: Generally for photograph, dye, pesticide rubber, chemical industry, medicine, polymer retarder, desulphurization in fertilizer, urea synergist antioxidant, analyse chemical reagent and so.
Packing: 25kg (net weight) kraft paper bag lined with two plastic bags.
(2) Technical Grade
Molecular Formual: 1,4-C6H4(OH)2
Molecular weight: 110.12 (According to the international atomic weight of 1987)
Specification: Content: ≥98.5%
Usage: Generally for photograph, dye, pesticide rubber, chemical industry, medicine, polymer retarder, desulphurization in fertilizer, urea synergist antioxidant, analyse chemical reagent and so.
Packing: 25kg (net weight) kraft paper bag lined with two plastic bags
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Name of product
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HYDROQUINONE
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Source of sample
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Workshop
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Spec.
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Photo grade
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Item
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Specification
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Result
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Appearance
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White acicular crystal or crystal powder
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White acicular crystal or
crystal powder
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Content(%)
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≥99-101
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99.8
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Melting point(°C)
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171-175
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171.3-172.5
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Residue after ignition(%)
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≤0.05
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0.03
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Fe(%)
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≤0.002
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<0.002
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Pb(%)
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≤0.002
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<0.002
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