Description

Sodium Phenylbenzimidazole Sulfonate is a high-purity organic salt widely recognized for its exceptional performance as a water-soluble UV filter. This compound is valued for its ability to provide broad-spectrum protection against ultraviolet radiation, making it a critical ingredient in advanced formulations. It is primarily sought after by manufacturers in the personal care, cosmetic, and pharmaceutical industries for developing sunscreens and protective skincare products that require effective, photostable, and safe UV-A and UV-B filtration.

Application

• Primary UV Filter in sun care products, including sunscreens, sunblocks, and after-sun lotions.
• Key Ingredient in daily wear cosmetics and moisturizers with SPF protection.
• Photostabilizing Agent in formulations to enhance the longevity and efficacy of other organic UV absorbers.
• Functional Additive in protective coatings for specialized packaging or materials sensitive to UV degradation.
• Active Pharmaceutical Ingredient (API) in topical dermatological preparations designed for photosensitive skin conditions.

Basic Information

Product Name	Sodium Phenylbenzimidazole Sulfonate
CAS No.	5997-53-5
Molecular Formula	C13H9N2NaO3S
Molecular Weight	296.28 g/mol
Synonyms	2-Phenylbenzimidazole-5-sulfonic acid sodium salt; Ensulizole; PBSA; Eusolex 232; Phenyldibenzimidazole Tetrasulfonate (disodium salt); 2-Phenyl-1H-benzimidazole-5-sulfonic acid monosodium salt; Sodium 2-phenylbenzimidazole-5-sulfonate
EINECS	227-851-2

Quality Control

Our Sodium Phenylbenzimidazole Sulfonate is manufactured under strict quality management systems. Each batch is tested to ensure it meets high-purity standards suitable for cosmetic and pharmaceutical applications. We provide comprehensive Certificates of Analysis (COA) detailing purity, identity, and impurity profiles. Our quality commitment aligns with global regulatory expectations, including relevant sections of the USP/NF and EU cosmetic ingredient regulations (EC) No 1223/2009.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at a controlled room temperature (15-25°C). This material is hygroscopic (moisture-sensitive); therefore, the container must be kept tightly sealed to prevent absorption of atmospheric moisture, which can affect product stability and performance.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to reference spectrum
Assay (HPLC)	98.0% - 102.0% (on anhydrous basis)
pH (1% Solution)	6.0 - 8.0
Water Content (KF)	≤ 5.0 %
Residue on Ignition	≤ 0.2 %
Heavy Metals (as Pb)	≤ 20 ppm
Related Substances (HPLC)	Total impurities ≤ 2.0% Any single impurity ≤ 1.0%

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.