Chemical Name: 2-Phenylbenzimidazole-5-sulfonic acid

INCI Name: Phenylbenzimidazole Sulfonic Acid

Alias: Ultraviolet Absorbent UV-T; Ultraviolet Absorber UV-T; Ensulizole; PBSA

CAS No.: 27503-81-7

EINECS No.: 248-502-0

Molecular Formula: C13H10N2O3S

Molecular Weight: 274.3

Chemical Structural Formula:

HS Code: 2933990099

Testing Items	Specifications
Appearance	White to off-white powder
Assay	98.0% ~ 102.0%
Loss on Drying	Not more than 2.0%
Absorbance	At 302nm: 920-1000

Features and Uses:

2-Phenylbenzimidazole-5-sulfonic acid is a high-efficiency UVB absorber, with an ultraviolet absorption rate of at least 920 at about 302nm, and can also absorb a small part of the UVA band. It belongs to water-soluble chemical sunscreens. It is often used in combination with other ingredients such as avobenzone, titanium dioxide, zinc oxide, or tinosorb. Its protective power and quality of protection do not gradually decrease over time when exposed to sunlight, thus somewhat mitigating the breakdown of other UVB blockers in sunscreens. The non-greasy texture also converts ingested UV radiation into less harmful infrared radiation and heat.

Package: 20kg cardboard drum or 20kg cardboard box.

Shelf Life: 24 Months