Dioxybenzone (benzophenone-8) is an organic compound used in sunscreen to block UVB and short-wave UVA rays. It is a derivative of benzophenone. It is insoluble in water, which lends to the ‘waterproof’ claims that sunscreens make. It’s approved for use in the US at a concentration of 3%.

Cinoxate, a cinnamate, is a potent ultraviolet absorber at 289 nm. It is approved by FDA as the active ingredient in sunscreen compositions for over-the-counter (OTC) use at concentrations up to 3% and a minimum SPF value of not less than 2 in the finished product but is rarely used It can cause photoallergic contact dermatitis.

Ensulizole (INN) (phenylbenzimidazole sulfonic acid) 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. It is a selective UVB filter, allowing almost all UVA transmission. 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 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

Homosalate is used as a broad-band UV filter in concentrations of up to 10% in the EU or 15% depending upon where the product is used (e.g. in the USA) in sunscreen products alone or in combination with other UV absorbers to protect the skin against harmful effects of the UV radiation.

Octisalate used as an ingredient in sunscreens and cosmetics. Maximum FDA-approved concentration - 5%. Range of protection - UVB. Might develop contact allergic dermatitis