Bemotrizinol

Absorption

No pharmacokinetic data available.

Toxicity

Oral LD50 in rat is > 2000 mg/kg and dermal LD50 in rabbit is > 2000 mg/kg, respectively .

Description

Bemotrizinol, or bis-ethylhexyloxyphenol methoxyphenyl triazine, is an organic UV filter found in over-the-counter sunscreen products. It primarily absorbs UV-A rays. Compared to older broad-spectrum chemical agents, bemotrizinol is more more fat soluble (oil soluble in cosmetic oils) to aid in efficacy and broad-spectrum activity. It is claimed to be photostable, which increases its onset of action and its efficiency in providing protection against UV-rays upon topical application. Bemotrizinol is commonly marketed as Tinosorb S and Escalol S.

The Uses of Bemotrizinol

Bemotrizinol is a broad-spectrum UV absorber, absorbing both UVA and UVB. Bemotrizinol is added to various sunscreens to absorb UV rays.

Background

Bemotrizinol, or bis-ethylhexyloxyphenol methoxyphenyl triazine, is an organic UV filter found in over-the-counter sunscreen products. It primarily absorbs UV-A rays. Compared to older broad-spectrum chemical agents, bemotrizinol is more more fat soluble (oil soluble in cosmetic oils) to aid in efficacy and broad-spectrum activity . It is claimed to be photostable, which increases its onset of action and its efficiency in providing protection against UV-rays upon topical application . Bemotrizinol is commonly marketed as Tinosorb S and Escalol S.

Indications

Indicated as an active sunscreen agent.

Definition

ChEBI: Bemotrizinol is a member of methoxybenzenes.

brand name

Tinosorb S (Ciba Specialty Chemicals).

Flammability and Explosibility

Non flammable

Pharmacokinetics

Findings from an immature rat uterotrophic competitive binding assay suggest that bemotrizinol does not display significant binding affinities towards estrogen and androgen receptors in vitro, thus lacking intrinsic estrogenic, antiestrogenic, androgenic and antiandrogenic activity . Bemotrizinol minimizes erythema and provides excellent anti-aging effects as well as protectant effects on the skin's antioxidant defense system . In a comparative study of individuals with a history of polymorphic light eruption (PLE) undergoing photoprovocation, treatment of bemotrinizol was effective in preventing the development of PLE .

Safety

Because bemotrizinol is relatively new to the sunscreen market there are few reports or studies available documenting its adverse effects and long term use. Studies to date have shown it to have a good safety profile. It is not significantly absorbed into the skin and rarely causes skin irritation. Unlike some other organic sunscreen agents, in vitro studies show that bemotrizinol does not appear to have hormonal effects. Further long-term human safety studies are required.

Metabolism

No pharmacokinetic data available.

Regulations

Bemotrizinol is approved for use in Europe and Australasia. It is marketed under the brand names Tinosorb S and Escalol S. It is currently awaiting FDA approval so is not available in the USA.