2-Hydroxy-4-methoxybenzophenone-5-sulfonic acid (CAS: 4065-45-6)

Application

Is A broad-spectrum UV absorber, absorption with high efficiency, non-toxic side effects, no

teratogenicity, optical, thermal stability is good wait for an advantage, it also can absorb uv-a

and UV – B, is approved by the FDA Ⅰ kind of sunscreen, use frequency is higher in the

United States and Europe, widely used in sun lotion, cream, honey, latex, oil and other sunscreen cosmetics.

Can be used for other water-soluble ink, paint, etc for uv absorber.

As anti-ultraviolet finishing agent for cotton fabric, polyester fiber has good anti aging and softening effect.

Process

Is A broad-spectrum UV absorber, absorption with high efficiency, non-toxic side effects, no teratogenicity,

optical, thermal stability is good wait for an advantage, it also can absorb uv-a and UV – B, is approved by

the FDA Ⅰ kind of sunscreen, use frequency is higher in the United States and Europe, widely used in sun

lotion, cream, honey, latex, oil and other sunscreen cosmetics.

Can be used for other water-soluble ink, paint, etc for uv absorber.

2-hydroxy-4-methoxy diphenyl ketone synthesis: first of all to add 300 kg chlorobenzene condensation kettle,

adding catalyst AlCl3 under stirring, 350 kg, isophthalic ether 120 kg. Heated to 80 ℃ or so, slowly add

benzoyl chloride 320 kg. Reflow 4 ~ 6 h, cooling, hydrolysis, evaporate the solvent, cooling, crystallization,

drying, 2 – hydroxy – 4 – methoxy diphenyl ketone.

2-hydroxy-4-methoxy-5-sulphonic acid base of synthesis of diphenyl ketone: first of all to add 93% of

sulfuric acid, sulfonated kettle under stirring slowly add 2 – hydroxy – 4 – methoxy diphenyl ketone, at

about 110 ℃ 4 ~ 6 h reaction, cooling, crystallization, dry, recrystallization is the finished product.