Strontium Thioglycolate

INCI: STRONTIUM THIOGLYCOLATE

CAS Number
55499-04-2
Function
Depilatory agent, hair waving/straightening
Safety Rating
MODERATE

Regulatory Status

๐Ÿ‡ช๐Ÿ‡บ EU Status restricted
EU Max Conc. 5%
๐Ÿ‡บ๐Ÿ‡ธ US Status permitted
US Notes Permitted; thioglycolates are widely used in US depilatory and hair waving products

For full compliance data across 55 jurisdictions, use the Substance Compliance tool.

Safety Data

Margin of Safety (MoS)
adequate
Dermal Absorption
moderate
Sensitization
high

Calculate MoS for your specific formulation with the MoS Calculator.

Expert Verdict

Known sensitizer; mandatory warnings "Contains thioglycolate โ€” follow instructions"; professional-only at higher concentrations; pH control critical; must not contact eyes; combined Sr salt limits apply

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Concern Level: Moderate

Regulatory Flags

potential-allergen

Frequently Asked Questions

Is Strontium Thioglycolate safe in cosmetics?

Known sensitizer; mandatory warnings "Contains thioglycolate โ€” follow instructions"; professional-only at higher concentrations; pH control critical; must not contact eyes; combined Sr salt limits apply The EU classifies Strontium Thioglycolate as "restricted". Safety rating: MODERATE.

Is Strontium Thioglycolate allowed in the EU?

Strontium Thioglycolate EU regulatory status: restricted. Maximum allowed concentration: 5%. This is based on EU Regulation 1223/2009 and its amendments.

What does Strontium Thioglycolate do in cosmetics?

Strontium Thioglycolate functions as: Depilatory agent, hair waving/straightening. It is classified as a cosmetic ingredient in our database. CAS number: 55499-04-2.

What is the Margin of Safety for Strontium Thioglycolate?

adequate The Margin of Safety (MoS) is calculated using SCCS methodology. A MoS above 100 is generally considered safe. Use the MoS Calculator tool to calculate MoS for your specific formulation and product category.

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