# PHENYLBENZIMIDAZOLE SULFONIC ACID (phenylbenzimidazole-sulfonic-acid) — Global Cosmetic Regulatory & Formulation Monograph

- **Canonical URL**: https://www.inciname.com/en/ingredients/phenylbenzimidazole-sulfonic-acid
- **Standard INCI**: `PHENYLBENZIMIDAZOLE SULFONIC ACID`
- **KR MFDS Standard Name**: `페닐벤즈이미다졸설포닉애씨드`
- **CAS No.**: `27503-81-7`
- **EC / EINECS No.**: `248-502-0`
- **Origin**: `synthetic`
- **Functions**: 자외선차단제, 광안정제
- **Molecular Formula / MW**: `—` (— g/mol)

## 1. 7-Track Official Regulatory Label Names
| Track | Official Label Nomenclature |
| :--- | :--- |
| KR (MFDS Standard) | 페닐벤즈이미다졸설포닉애씨드 |
| KR (Former Names) | — |
| EU (CosIng 1223/2009) | PHENYLBENZIMIDAZOLE SULFONIC ACID |
| US (PCPC / MoCRA INCI) | PHENYLBENZIMIDAZOLE SULFONIC ACID |
| US (FDA OTC Monograph) | ENSULIZOLE |
| CN (NMPA IECIC) | 苯基苯并咪唑磺酸 |
| JP (JCIA / MHLW QD) | PHENYLBENZIMIDAZOLE SULFONIC ACID  |

## 2. Layer 1 — Global 6-Region Statutory Summary
- **KR (MFDS)**: `restricted`
- **EU (1223/2009)**: `restricted`
- **US (FDA/MoCRA)**: `none`
- **CN (NMPA IECIC)**: `allowed` (Entry: `1270`)
- **JP (MHLW)**: `restricted`
- **ASEAN (ACD)**: `none`



## 3. Layer 2 — Toxicological & Historical Safe Use Concentrations
- Listed within general cosmetic GMP safety thresholds.

## 4. Layer 3 — Formulation Quartiles & Compatibility
- **Optimal pH Window**: 4 – 8
- **Max Process Temp**: ≤ 50°C
- **Synergy Pairings**: GLYCERIN, CAPRYLIC/CAPRIC TRIGLYCERIDE, TOCOPHEROL
- **Incompatibilities**: Verify phase compatibility under extreme pH or high electrolyte loads

## 5. Academic Monograph
■ [1. Chemical Identity & International Labeling Nomenclature]
  - INCI Name: PHENYLBENZIMIDAZOLE SULFONIC ACID | CAS No.: 27503-81-7 | EC No.: 248-502-0
  - Origin: SYNTHETIC | Functions: , 
  - Physicochemical Profile: Formula      | MW /(Polymer/Complex) | /   | Ionic Nature: non-ionic | CosIng/MFDS 
  - Official Regional Label Names: US [PHENYLBENZIMIDAZOLE SULFONIC ACID] · EU [PHENYLBENZIMIDAZOLE SULFONIC ACID] · CN [苯基苯并咪唑磺酸] · JP [-] · JP Quasi-Drug [-]
■ [2. Dermatological Mechanism of Action & Functional Role]
  - Phenylbenzimidazole Sulfonic Acid is the aromatic organic compound that conforms to the formula: Classified under origin 'synthetic', it acts within the cosmetic vehicle or stratum corneum to deliver ,  performance and structural formulation stability.
■ [3. Global 6-Jurisdiction Regulatory Status & Safety Limits (Layer 1 & Layer 2)]
  - Regional Summary: KR: RESTRICTED | EU: RESTRICTED | US: NONE | CN: ALLOWED | JP: RESTRICTED | ASEAN: NONE (CN IECIC (2025) Entry No. 1270 (苯基苯并咪唑磺酸))
  - [KR / COMPOSITION / limited] (Max 4%): 
  - [EU / COMPOSITION / limited] (Max 8%): 
  - [KR / CLAIM / noted]: 
  - Official Safety & Historical Use Concentration (Layer 2): Quantum satis (QS) within standard cosmetic safety margins
■ [4. Formulation Dosage Guide by Product Category (Layer 3-A)]
  - [sun_color] Typical range: 0.5 ~ 7.0% (Median 3.0%, Ref: Global Starter Formulation Library Statistical Distribution (n=19, EVONIK 17 · SEPPIC 2)) — Sun care & color cosmetics dispersion / sensory modifier
■ [5. Formulation Engineering, Stability & Incompatibility Matrix (Layer 3-B)]
  - Addition Phase: Water Phase or Cool-down Phase (< 45°C)
  - Optimal pH Range: pH 4.0 ~ 8.0 | Max Process Temp: Max 50°C | Electrolyte Tolerance: MEDIUM
  - Incompatibility / Caution: Verify phase compatibility under extreme pH or high electrolyte loads
  - Synergy Pairings: GLYCERIN, CAPRYLIC/CAPRIC TRIGLYCERIDE, TOCOPHEROL | Reference Trade Names: PHENYLBENZIMIDAZOLE SULFONIC ACID
■ [6. Peer-Reviewed Literature & Official Compendia Evidence]
  - Validated against official regulatory compendia (MFDS/CosIng/CIR/SCCS) and physicochemical standards.

## 6. Linked PubMed Literature