久久久久九九精品影院|国产经典一区|操丝袜逼|东京道一本热大交乱|亚洲啪在线
Caustic soda
Citric Acid
Oxalic Acid
Formic Acid
Paraffin Wax
Sodium Benzoate
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SODIUM THIOSULFATE
purity 99%min
Water insoluble 0.01%max
Na2S 0.001%max
Fe 0.002%max
appearance colorless or little yellow crystalline
packing 25kgs plastic woven bag
 
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