2-Phenylbenzimidazole-5-sulfonic acid
- CAS No.
- 27503-81-7
- Chemical Name:
- 2-Phenylbenzimidazole-5-sulfonic acid
- Synonyms
- PHENYLBENZIMIDAZOLE SULFONIC ACID;Ensulizole;PBSA;2-phenyl-1H-benzimidazole-5-sulphonic acid;PARSOL HS;EUSOLEX 232;HYSHELL PBSA;PHENYLBENZIMIDAZOLESULPHONICACID;2-Phenyl-1H-benzimidazole-5-sulfonic acid;Novantisol
- CBNumber:
- CB4394499
- Molecular Formula:
- C13H10N2O3S
- Molecular Weight:
- 274.3
- MDL Number:
- MFCD00053007
- MOL File:
- 27503-81-7.mol
- MSDS File:
- SDS
- TDS File:
- TDS
| Melting point | >300 °C (lit.) |
|---|---|
| Density | 1.3592 (rough estimate) |
| refractive index | 1.6360 (estimate) |
| storage temp. | 2-8°C |
| solubility | ethanol and water: soluble ((as sodium salt)) |
| form | Fine Crystalline Powder |
| pka | -0.87±0.40(Predicted) |
| color | White |
| Water Solubility | soluble |
| Merck | 14,3593 |
| BRN | 922664 |
| Stability | Hygroscopic |
| Major Application |
cleaning products cosmetics environmental food and beverages personal care |
| Cosmetics Ingredients Functions |
UV FILTER LIGHT STABILIZER UV ABSORBER |
| 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) |
| InChIKey | UVCJGUGAGLDPAA-UHFFFAOYSA-N |
| SMILES | OS(=O)(=O)c1ccc2[nH]c(nc2c1)-c3ccccc3 |
| LogP | -1.42 at 25℃ |
| CAS DataBase Reference | 27503-81-7(CAS DataBase Reference) |
| EWG's Food Scores | 2-3 |
| FDA UNII | 9YQ9DI1W42 |
| EPA Substance Registry System | 1H-Benzimidazole-5-sulfonic acid, 2-phenyl- (27503-81-7) |
| UNSPSC Code | 41116107 |
| NACRES | NA.24 |
SAFETY
Risk and Safety Statements
| Symbol(GHS) |  GHS07 |
|||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Signal word | Warning | |||||||||
| Hazard statements | H315-H319-H335 | |||||||||
| Precautionary statements | P264-P280-P302+P352+P332+P313+P362+P364-P305+P351+P338+P337+P313-P261-P280a-P304+P340-P305+P351+P338-P405-P501a | |||||||||
| Hazard Codes | Xi,C | |||||||||
| Risk Statements | 36/37/38 | |||||||||
| Safety Statements | 26-36 | |||||||||
| WGK Germany | 3 | |||||||||
| TSCA | TSCA listed | |||||||||
| HS Code | 29339990 | |||||||||
| Storage Class | 11 - Combustible Solids | |||||||||
| REACH Registrations | Active | |||||||||
| NFPA 704 |
|
2-Phenylbenzimidazole-5-sulfonic acid price More Price(60)
| Manufacturer | Product number | Product description | CAS number | Packaging | Price | Updated | Buy |
|---|---|---|---|---|---|---|---|
| Sigma-Aldrich | 437166 | 2-Phenyl-5-benzimidazolesulfonic acid 96% | 27503-81-7 | 50g | $91.7 | 2026-04-30 | Buy |
| Sigma-Aldrich | 1530809 | Ensulizole United States Pharmacopeia (USP) Reference Standard | 27503-81-7 | 200mg | $422 | 2026-04-30 | Buy |
| TCI Chemical | P1670 | 2-Phenyl-5-benzimidazolesulfonic Acid >95.0%(T) | 27503-81-7 | 25g | $32 | 2026-04-30 | Buy |
| Usbiological | 287297 | 2-Phenyl-5-Benzimidazolesulfonic Acid Asreported | 27503-81-7 | 10g | $297 | 2026-06-03 | Buy |
| Usbiological | 287297 | 2-Phenyl-5-Benzimidazolesulfonic Acid Asreported | 27503-81-7 | 25g | $398 | 2026-06-03 | Buy |
2-Phenylbenzimidazole-5-sulfonic acid Chemical Properties, Uses, Production
Chemical Properties
white fine crystalline powder
Uses
ensulizole is one of the chemical names for phenylbenzimidazole sulfonic acid. used as a sunscreen ingredient and also to protect a product from deterioration caused by uV light.
Uses
phenylbenzimidazole sulfonic acid (2-phenyl-5-benzimidazolesulfonic acid; 2-phenylbenzimidazole-5-sulfonic acid, ensulizole) is one of 21 FDA-approved sunscreen chemicals for uVB absorption. It has an approved usage level of up to 4 percent in the united States and up to 8 percent in the european union. When combined with a proper base, it becomes a water-soluble sunscreen. It exhibits a very effective use level versus SPF relationship when compared to other sunscreen chemicals. In addition, when combined with other uVB absorbers, it seems to significantly boost SPF. It can also help protect a product from deterioration when exposed to uV light. Also considered excellent for use in clear sunscreen gels.
Uses
Phenylbenzimidazole sulfonic acid or ensulizole is a water-soluble UVB absorber that can be utilized in the water phase of emulsion systems, in contrast to most oil-soluble sunscreen ingredients, allowing for a less greasy, more aesthetically pleasing formulation such as a daily use moisturizer containing sunscreen. Phenylbenzimidazole sulfonic acid boosts the SPF of organic and inorganic sunscreens. It can also be used in clear gels owing to its water solubility.
Definition
ChEBI: Ensulizole is a member of benzimidazoles.
General Description
2-Phenyl-5-benzimidazolesulfonic acid has been reported as a UV filter and its removal from aerobically treated gray water by ozonation and adsorption onto activated carbon has been reported. It is a xenobiotic compound detected in gray water from houses and effluents of the biological treatment systems (aerobic, anaerobic, and combined anaerobic+aerobic).
Flammability and Explosibility
Non flammable
2-Phenylbenzimidazole-5-sulfonic acid Preparation Products And Raw materials
| Supplier | Tel | Country | ProdList | Advantage | |
|---|---|---|---|---|---|
| NINGBO JL NEW MATERIAL CO.,LTD | 0574 88552216 18969899212 | sales@chematerials.cn | China | 1512 | 58 |
| FUJIAN DISHENG TECHNOLOGY CO.,LTD. | 0571-88226505 17757185101 | ah@dishengchem.com | China | 41 | 58 |
| Chongqing Werlchem Fine Chemical Co.Ltd. | 023-67521957 13320292971 | sales@werlchem.com | China | 26 | 62 |
| Hangzhou Lin'an tianhong biotechnology co.,ltd. | 13606615626; 15957181975 | hu@tianhongsw.com | China | 54 | 58 |
| Wuhan BJM Pharm Inc | 18607102166 18607102166 | sales04@benjaminpharmchem.com | China | 242 | 58 |
| Hubei Chuchang Chemical Co., Ltd | 18 15623560702 | info@chuchangbiotech.com | China | 190 | 58 |
| Shanghai Xianggeng Technology Development Co. Ltd. | 021-021-56152668 18116302010 | sharing@sharingtechcn.com | China | 499 | 58 |
| J & K SCIENTIFIC LTD. | 18210857532 18210857532 | jkinfo@jkchemical.com | China | 96815 | 76 |
| Meryer (Shanghai) Chemical Technology Co., Ltd. | 4006356688 18621169109 | market03@meryer.com | China | 40202 | 62 |
| Alfa Aesar | 400-6106006 | saleschina@alfa-asia.com | China | 30103 | 84 |
View Latest Price from 2-Phenylbenzimidazole-5-sulfonic acid manufacturers
| Image | Update time | Product | Price | Min. Order | Purity | Supply Ability | Manufacturer | |
|---|---|---|---|---|---|---|---|---|
 |
2026-09-14 | 2-Phenylbenzimidazole-5-sulfonic acid
27503-81-7
|
1kg/Bag | ≥98% | 50 T/Month | Hebei Qujie Technology Co., Ltd. | ||
 |
2026-09-11 | 2-Phenylbenzimidazole-5-sulfonic acid/Ensulizole
27503-81-7
|
1KG | 98%-102% | 1000 KG | WUHAN FORTUNA CHEMICAL CO., LTD | ||
 |
2026-09-02 | 2-Phenylbenzimidazole-5-sulfonic acid
27503-81-7
|
$5.00 | 1KG | 99% | Henan Fengda Chemical Co., Ltd |
-
- 2-Phenylbenzimidazole-5-sulfonic acid
27503-81-7
- $0.00
- ≥98%
- Hebei Qujie Technology Co., Ltd.
-
- 2-Phenylbenzimidazole-5-sulfonic acid/Ensulizole
27503-81-7
- 98%-102%
- WUHAN FORTUNA CHEMICAL CO., LTD
-
- 2-Phenylbenzimidazole-5-sulfonic acid
27503-81-7
- $5.00
- 99%
- Henan Fengda Chemical Co., Ltd
