143982-77-8 Usage
General Description
2,2'-Dihydroxy-4,4'-dimethoxybenzophenone-5,5'-disulfonic acid is a complex organic compound that belongs to the class of benzophenone derivatives. It is commonly used as a UV absorber in sunscreen and other cosmetic products due to its ability to protect the skin from the harmful effects of UV radiation. The compound is also used in the production of plastics, adhesives, and other industrial applications. Its chemical structure contains two hydroxyl groups and two methoxy groups, as well as two sulfonic acid groups, which give it a high degree of water solubility. It is an important ingredient in many commercial products for its light-absorbing and photostabilizing properties.
Check Digit Verification of cas no
The CAS Registry Mumber 143982-77-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,4,3,9,8 and 2 respectively; the second part has 2 digits, 7 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 143982-77:
(8*1)+(7*4)+(6*3)+(5*9)+(4*8)+(3*2)+(2*7)+(1*7)=158
158 % 10 = 8
So 143982-77-8 is a valid CAS Registry Number.
143982-77-8Relevant articles and documents
Water-soluble ultraviolet absorbent BP-9 method for the synthesis of (by machine translation)
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Paragraph 0006; 0025; 0027, (2017/01/17)
The invention discloses a synthetic method of a water soluble ultraviolet light absorber BP-9. The method mainly comprises the following process steps: (1) carrying out methylation on the main raw materials of 2, 2', 4, 4'-tetrahydroxyl benzophenone, a transition metal salt catalyst and a mixed solvent which is prepared from dichloroethane and anhydrous ethanol in equal parts by weight to obtain 2, 2'-dihydroxyl-4, 4'-dimethoxyl benzophenone; (2) carrying out sulfonation reaction on the main raw materials of methylate, sulfamic acid and C1-C3 halohydrocarbon to obtain 2, 2'-dihydroxyl-4, 4'-dimethoxyl benzophenone-5, 5'-disulfonic acid; and (3) carrying out neutral reaction on the main raw materials of sulfonated product, inorganic base and ethanol water to finally obtain the BP-9 product. The synthetic method disclosed by the invention is few in reaction step, low in cost, high in product purity and stable in quality, and raw materials are easily available.
