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    Product Antioxidant 168 Chemical name Tris(2,4-di-t-butylphenyl)phosphite Molecular formula C 42 H 63 O 3 P CAS No. 31570-04-4 Structure formula Quality indicators Appearance White crystalline powder Content 99% Melting point 182-186℃ Vol

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    Ningbo Hanson Chemical Co. (Ningbo, China) Antioxidant 1010 (C 73H 108O 12, CAS No. 6683-19-8) and antioxidant 168 (C 42H 63O 3P, CAS No. 31570-04-4) were purchased from Double Bond Chemical Industry Co (Tianjin, China). Preparation of Flame-Retarded HIPS Composites HIPS, AP, and MCA were all dried at 908C in vacuum for 5h before using.

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    Irgafos® 168 Chemical name: tris(2,4-di-tert-butylphenyl) phosphite CAS Number: 31570-04-4 REACH registration number: 01-2119491176-33-0001, 01-2119491176-33-0000 1.2. Relevant identified uses of the substance or mixture and uses advised against Relevant identified uses: antioxidant

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    Antioxidant 168 is a white crystalline powder, melting point 181-184℃,soluble in benzene, toluene, gasoline, insoluble in water and alcohol.

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    The invention relates to a purifying method of an antioxidant 168. The method comprises the following steps that coarse products of the antioxidant 168 are recrystallized for once to three times by mixed solvents consisting of ethyl acetate and carbinol according to a mixture ratio being 5:1, and antioxidant 168 crystals with the purity higher than 99.5 percent are obtained.

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