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Moumoujus

SODIUM HYDROXYMETHANE SULFONATE.

Questionable CAS 870-72-4 / ANTIMICROBIAL, REDUCING

Sodium Hydroxymethane Sulfonate is a chemical compound primarily utilized for its preservative and reducing properties in cosmetic formulations. It functions by slowly releasing formaldehyde and sodium bisulfite under specific pH conditions, contributing to its antimicrobial and antioxidant effects.

Summary

Preservative Antimicrobial Reducing agent Antioxidant

Science

Mechanism of Action

Operating under alkaline conditions, specifically at a pH of 7.0 or higher, Sodium Hydroxymethane Sulfonate undergoes hydrolysis. This process gradually releases formaldehyde and sodium bisulfite. The combined action of these breakdown products confers antibacterial and antioxidant preservative properties, while the compound itself also acts as a reducing agent within the formulation.

Research

Clinical Evidence

Low confidence
Effective range N/A
Optimal

N/A

Transparency

Dusting Analysis

Not commonly dusted

The Formula

Formulation

Solubility
Water
Optimal pH 6.5 – 8
0 7 14

Stability

This ingredient exhibits stability in aqueous alkaline environments, but its integrity is compromised by rapid decomposition in acidic mediums. It is also hygroscopic.

Conflicts

  • acidic medium
  • strong oxidizing agents

Safety

Safety Profile

CIR Status
Not reviewed
Sensitization risk Moderate

No specific review by the Cosmetic Ingredient Review (CIR) or the SCCS has been found for Sodium Hydroxymethane Sulfonate. While generally considered to have low toxicity (oral-rat LD50 of 3200 mg/kg) and not classified as a hazardous substance under EC No. 1272/2008 for 95.8% of reports, it is identified as a human skin and eye irritant due to its potential to release formaldehyde. Risk Codes 36/37/38 indicate potential irritation to eyes, respiratory system, and skin, advising against direct contact.

Your Skin

Skin Compatibility

No Normal
No Dry
No Oily
No Sensitive
Irritancy Moderate
Comedogenicity Unknown

Our Assessment

Verdict

Questionable

While offering valuable preservative and reducing capabilities, the potential release of formaldehyde and associated irritation risks, combined with the absence of comprehensive safety reviews from key regulatory bodies, makes this ingredient a questionable choice for precision skincare.

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