2-Phenylbenzimidazole-5-sulfonic acid (PBSA)

2-Phenylbenzimidazole-5-sulfonic acid (PBSA)

CAS Number
27503-81-7
Molecular Formula
C13H10N2O3S
UVB AbsorptionWater-Soluble: Easily dissolves in aqueous formulationsPhotostabilityFormulation Flexibility

About 2-Phenylbenzimidazole-5-sulfonic acid (PBSA)

2-Phenyl Benzimidazole-5-Sulfonic Acid (PBSA) is an organic compound with excellent UV absorption properties, used primarily in sunscreens and personal care products. It offers broad-spectrum protection by absorbing UVA and UVB rays, making it an essential ingredient in cosmetic formulations. The compound's high photos...

Synonyms

  • 2-phenylbenzimidazole-5-sulfonic acid
  • 2-phenylbenzimidazole-5-sulfonic acid, monosodium salt
  • ensulizole
  • Eusolex 232
  • novantisol

2-Phenylbenzimidazole-5-sulfonic acid (PBSA) Specifications

CAS Number
27503-81-7
Molecular Formula
C13H10N2O3S
IUPAC Name
2-phenyl-3H-benzimidazole-5-sulfonic acid
Canonical SMILES
C1=CC=C(C=C1)C2=NC3=C(N2)C=C(C=C3)S(=O)(=O)O
InChI Key
UVCJGUGAGLDPAA-UHFFFAOYSA-N
InChI
InChI=1S/C13H10N2O3S/c16-19(17,18)10-6-7-11-12(8-10)15-13(14-11)9-4-2-1-3-5-9/h1-8H,(H,14,15)(H,16,17,18)
EINECS Number
220-102-2
MDL Number
MFCD00053007
UNSPSC Code
41116107
NACRES
NA.24
HSN No
2933.99
melting_point
>300, decomposes at 410
solubility
Soluble
Apperance
White to off-white powder Off-white
Identification by UV
< 0.3%
Solubility (10% NaOH solution)
Clear
UV specific extinction (E1%, 1cm at 302±2nm)
970
6 Assay by Titration (on dried basis)
99.25% w/w
GHS Classification
Not classified as hazardous under GHS regulations. May cause mild skin and eye irritation in sensitive individuals.
H-Statements
H315: Causes mild skin irritation. H319: Causes eye irritation. H335: May cause respiratory irritation (if inhaled in dust form).
P-Statements
P264: Wash hands thoroughly after handling. P280: Wear protective gloves, clothing, and eye protection. P305 + P351 + P338: If in eyes, rinse cautiously with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing. P302 + P352: If on skin, wash with plenty of soap and water.
Handling & Storage
Store in a cool, dry, and well-ventilated area away from direct sunlight. Keep container tightly sealed to prevent moisture absorption. Avoid inhalation of dust and contact with eyes, skin, and clothing. Use appropriate personal protective equipment (PPE) such as gloves and safety goggles when handling.
First-Aid Measures
Inhalation: Move to fresh air immediately. Seek medical attention if symptoms persist. Skin Contact: Wash with soap and water. Remove contaminated clothing. Eye Contact: Rinse with plenty of water for at least 15 minutes. Seek medical help if irritation continues. Ingestion: Rinse mouth with water. Do not induce vomiting. Seek medical advice if discomfort occurs.
Fire & Explosion Hazard
Flammability: Non-flammable under normal conditions. Extinguishing Media: Use water spray, foam, dry chemical, or CO₂. Decomposition Products: Can release sulfur oxides (SOₓ), nitrogen oxides (NOₓ), and carbon oxides (COₓ) when exposed to extreme heat.
Toxicological Information
Acute Toxicity: Low toxicity under normal use conditions. Skin & Eye Irritation: May cause mild irritation with prolonged exposure. Environmental Impact: Considered biodegradable but should not be released into water bodies in large quantities.

Cosmetics

Used in sunscreens and other personal care products as a UV filter.

Skincare

Found in anti-aging and sun protection formulations.

Low Skin Irritation

Generally non-sensitizing and suitable for sensitive skin when used within recommended concentrations.

Non-Oily Texture

Suitable for oil-free formulations, ensuring a lightweight, non-greasy feel in personal care products.

Temperature

Store in a cool, dry place.

Environment

Keep away from heat, moisture, and direct sunlight.

Protection

Keep container tightly closed to avoid contamination.

STABILITY_DATA
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  1. 2-phenylbenzimidazole-5-sulfonic acid
  2. 2-phenylbenzimidazole-5-sulfonic acid, monosodium salt
  3. ensulizole
  4. Eusolex 232
  5. novantisol

2-Phenylbenzimidazole-5-sulfonic acid (PBSA) FAQs

Minimum Order Quantity

25 kg (pilot) · 1 MT (commercial)

Lead Time

3 – 5 weeks ex-works

Incoterms

FOB · CIF

Packaging

20 L pails, 200 L HDPE drums, 1000 L IBC

Regional Availability

India · EU · Middle East · Southeast Asia

Documentation

SDS · COA · TDS available on request

Compliance & Quality

REACH registered*

GHS/SDS available

ISO 9001:2015 site*

RoHS compliant*

Global sourcing network

Consistent quality & reliability

End-to-end technical support

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