Potassium Sodium Tartrate

INCI: POTASSIUM SODIUM TARTRATE

CAS Number
304-59-6 (anhydrous); 6381-59-5 (tetrahydrate / Rochelle salt)
Function
Buffering (pH control)
Safety Rating
EXCELLENT

Regulatory Status

๐Ÿ‡ช๐Ÿ‡บ EU Status permitted
๐Ÿ‡บ๐Ÿ‡ธ US Status permitted
US Notes Permitted in cosmetics; GRAS as a food additive (21 CFR 184.1804)

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

Safety Data

Margin of Safety (MoS)
not established
Dermal Absorption
low
Sensitization
none

Calculate MoS for your specific formulation with the MoS Calculator.

Expert Verdict

Well-tolerated ingredient with minimal safety concerns; established history of use in cosmetics and food applications.

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Concern Level: None

Regulatory Flags

fda_food_additive

Frequently Asked Questions

Is Potassium Sodium Tartrate safe in cosmetics?

Well-tolerated ingredient with minimal safety concerns; established history of use in cosmetics and food applications. The EU classifies Potassium Sodium Tartrate as "permitted". Safety rating: EXCELLENT.

Is Potassium Sodium Tartrate allowed in the EU?

Potassium Sodium Tartrate EU regulatory status: permitted. This is based on EU Regulation 1223/2009 and its amendments.

What does Potassium Sodium Tartrate do in cosmetics?

Potassium Sodium Tartrate functions as: Buffering (pH control). It is classified as a cosmetic ingredient in our database. CAS number: 304-59-6 (anhydrous); 6381-59-5 (tetrahydrate / Rochelle salt).

What is the Margin of Safety for Potassium Sodium Tartrate?

not established 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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