Ensulizole (INN) is a common sunscreen agent. In 1999, the United States Food and Drug Administration regulated that the name ensulizole be used on sunscreen labels in the United States. Phenylbenzimidazole sulfonic acid is primarily a UVB protecting agent providing only minimal UVA protection. The scope of UVB is 290 to 340 nanometers whereas the UVA range is 320 to 400 nanometers. For better UVA protection, it must be paired with avobenzone, titanium dioxide, or zinc oxide; outside of the United States it can also be paired with a UV absorber of the Tinosorb or Mexoryl types. Because phenylbenzimidazole sulfonic acid is water-soluble, it has the characteristic of feeling lighter on skin. As such, it is often used in sunscreen lotions or moisturizers whose aesthetic goal is a non-greasy finish. The free acid is poorly soluble in water, so it is only used as its soluble salts.

CAS：27503-81-7
中文别名：紫外线吸收剂UV-T;2-苯基-5-苯并咪唑磺酸;
英文别名：Ultraviolet absorbent UV-T;2-Phenyl-5-benzimidazolesulfonic acid,Ensulizole;PHENYLBENZIMIDAZOLSULPHONICACID;2-phenyl-benzimidazole-5-sulfonic acid;2-phenyl-5-benzimidazolesulfonic acid;Novantisol;2-Phenyl-5-benzimidazolesulfonic Acid;NEO HELIOPAN HYDRO;2-phenyl-1H-benzoimidazole-5-sulfonic acid;2-Phenyl-1H-benzo[d]imidazole-5-sulfonic acid;PARSOL HS;UV ABSORBER-T;2-phenylbenzimidazole-5-sulfonate salt;2-Phenylbenzimidazole-5-sulphonic acid;Ensulizole;EUSOLEX 232;2-Phenyl-5-sulfobenzimidazole;
分子式：C13H10N2O3S
分子量：274.295
精确质量：274.041
Psa：91.43
Logp：3.5574

MDL号：MFCD00150559

外观与性状：白色细结晶粉末
密度：1.497g/cm3
熔点：300 °C
闪点：>100ºC
水溶解性：soluble
稳定性：Stable under normal temperatures and pressures. May decompose when exposed to light.
储存条件：Keep container closed when not in use. Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances.

安全说明：S26-S36
危险类别码：R36/37/38
海关编码：29339990
危险品标志：Xi

用途
用作紫外吸收剂，用于防晒护肤化妆品中。