Excellent Cosmetic Ingredient NOAEL Data

Dihydrogen Phosphate

INCI: DIHYDROGEN PHOSPHATE

CAS Number
13598-36-2
Function
Buffering, pH adjustment
Safety Rating
EXCELLENT

Regulatory Status

๐Ÿ‡ช๐Ÿ‡บ EU Status permitted
๐Ÿ‡บ๐Ÿ‡ธ US Status permitted
US Notes Phosphate salts generally recognized as safe; widely used as pH buffer in cosmetics

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

Safety Data

Margin of Safety (MoS)
adequate
Dermal Absorption
negligible
Sensitization
none

Calculate MoS for your specific formulation with the MoS Calculator.

Toxicological Studies

1 study endpoint found for Dihydrogen Phosphate. NOAEL (No Observed Adverse Effect Level) values are used to calculate the Margin of Safety per SCCS methodology.

Endpoint Value Route Species Study Type Source
NOAEL 250 mg/kg bw/day oral rat oral REACH

Expert Verdict

Inorganic dihydrogen phosphate anion used as pH buffer and chelating agent in cosmetics; appears in formulations as its sodium (NaH2PO4) or potassium (KH2PO4) salt; CIR-assessed as safe with no EU restrictions and excellent safety profile.

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Concern Level: None

Regulatory Flags

pH-adjuster buffer inorganic CIR-reviewed epa_safer_alternative

Frequently Asked Questions

Is Dihydrogen Phosphate safe in cosmetics?

Inorganic dihydrogen phosphate anion used as pH buffer and chelating agent in cosmetics; appears in formulations as its sodium (NaH2PO4) or potassium (KH2PO4) salt; CIR-assessed as safe with no EU restrictions and excellent safety profile. The EU classifies Dihydrogen Phosphate as "permitted". Safety rating: EXCELLENT. 1 toxicological study endpoint(s) are available in our database.

Is Dihydrogen Phosphate allowed in the EU?

Dihydrogen Phosphate EU regulatory status: permitted. This is based on EU Regulation 1223/2009 and its amendments.

What does Dihydrogen Phosphate do in cosmetics?

Dihydrogen Phosphate functions as: Buffering, pH adjustment. It is classified as a cosmetic ingredient in our database. CAS number: 13598-36-2.

What is the Margin of Safety for Dihydrogen Phosphate?

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.

What is the NOAEL for Dihydrogen Phosphate?

The NOAEL (No Observed Adverse Effect Level) for Dihydrogen Phosphate is 250 mg/kg bw/day based on a oral study via oral route in rat. Source: REACH.

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