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PBSA (2-Phenyl-5-Benzimidazolesulfonic Acid) — CAS 27503-81-7 | UV Filter Supplier
CAS 27503-81-7
Water-phase UV-B filter with short-range UV-A contribution, based on a benzimidazole sulfonic acid chromophore.
Overview
2-Phenyl-5-benzimidazolesulfonic Acid (PBSA)
PBSA is a water-soluble organic UV filter supplied by Sigmak for personal care manufacturers (product code SIG-UV-001).
Absorbs ultraviolet radiation in the UV-B and short UV-A range through its aromatic sulfonic acid structure, dissipating the absorbed energy without generating reactive breakdown products under normal formulation conditions.
Product identity
- CAS Number
- 27503-81-7
- Molecular Formula
- C13H10N2O3S
- Molecular Weight
- 274.30
- Appearance
- White to off-white powder
- Purity
- NLT 98%
- EC Number
- 248-502-0
- Canada DSL
- Listed
Cosmetic / Formulation Applications
- Sunscreen formulations requiring a water-phase UV-B filter
- Personal care products with short-range UV-A and UV-B protection
- Cosmetic formulations that benefit from a water-soluble sun-protection active
Typical formulation considerations
- Water-soluble; typically added to the water phase of an emulsion rather than the oil phase used by lipophilic UV filters.
- Supplied as a non-hazardous substance for standard industrial handling.
Packaging & documentation
- Packaging
- 20 kg corrugated box
- Shelf life
- 3 years
- Storage
- Store at ambient temperature in a dry place away from direct sunlight.
- Documentation
- CoA / SDS / TDS available on request.
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