Is Potassium Sulfate safe in cosmetics?
Potassium Sulfate has a safety rating of "EXCELLENT" in our database. EU status: permitted. US status: permitted.
Potassium Sulfate
Also known as: Sulfuric acid dipotassium salt, Caswell No. 702, EINECS 231-915-5, EINECS 233-558-0, EPA Pesticide Chemical Code 005603 (+3 more)
INCI: POTASSIUM SULFATE
Potassium Sulfate (CAS 7778-80-5) is a cosmetic cosmetic ingredient functioning as Viscosity controlling. EU Regulation 1223/2009 status: permitted. Industrial safety data is also available in the chemical safety database. Same-CAS public records also appear in industrial chemical safety and pharmaceutical data.
View industrial chemical safety profile for CAS 7778-80-5 →
Auto-generated CPSR Part A draft with source citations
Cross-Vertical Regulatory Divergence
Potassium Sulfate is classified GHS Danger (H318) in the chemicals database but is allowed in EU cosmetics.
Source: Cosmetics: ingredients.eu_status; Chemicals: ghs_classifications.signal_word/hazard_statement_code
Function
Viscosity controlling
Safety Rating
EXCELLENT
Chemistry & Identifiers
IUPAC Name
dipotassium;sulfate
InChIKey
OTYBMLCTZGSZBG-UHFFFAOYSA-L
Regulatory Status
EU EU Status
permitted
US US Status
permitted
US Notes
GRAS as food substance; permitted in cosmetics without restriction
For full compliance data across multiple jurisdictions, use the Substance Compliance tool.
Safety Data
Margin of Safety, dermal absorption, and sensitization profile summaries for Potassium Sulfate.
Calculate MoS for your specific formulation with the MoS Calculator.
GHS Hazard Classification
Globally Harmonized System classification per ECHA C&L inventory and ILO/WHO International Chemical Safety Cards.
Short-term Exposure Effects
The substance is mildly irritating to the eyes, skin and respiratory tract.
ECHA REACH Registration
European Chemicals Agency REACH dossier and Substances of Very High Concern listing.
Registration Type
Full
Tonnage Band
1,000,000 - 10,000,000 tonnes
Substance Type
SUBSTANCE
SVHC Candidate
No
PubChem Annotations
Safety and regulatory annotations from PubChem (NCBI) aggregated sources.
Safety (1)
ICSC Safety Card
1451
Source: ILO-WHO International Chemical Safety Cards (ICSCs)
Regulatory (2)
JECFA Evaluation
POTASSIUM SULFATE | 1985 | NOT SPECIFIED | TRS 733-JECFA 29/26 | NOT PREPARED
Source: Joint FAO/WHO Expert Committee on Food Additives (JECFA)
EU Food Improvement
Food additives
Source: EU Food Improvement Agents
Function Categories & List Membership
Cosmetic/Chemical Function Categories
Crystal growth modifiers (nucleating agents)
Flavouring and nutrient
Processing aids not otherwise specified
Thickening agent
Viscosity modifier
Regulatory List Membership (2)
EPA Safer Chemical Ingredients List (SCIL)
FDA Substances Added to Food (EAFUS)
Expert Verdict
Expert safety assessment and concern-level summary for Potassium Sulfate.
Regulatory Flags
epa_safer_alternative
fda_food_additive
jecfa_safe
NOAEL Studies Summary
View details ->Public NOAEL study rows linked to Potassium Sulfate by CAS number or substance name.
Studies
12
Lowest NOAEL
256 mg/kg bw/day
Highest NOAEL
1975 mg/kg bw/day
ECHA_REACH_reach_study_results_dossiers_23-05-2023.zip
Known Synonyms
Sulfuric acid dipotassium salt
Caswell No. 702
EINECS 231-915-5
EINECS 233-558-0
EPA Pesticide Chemical Code 005603
Kalium sulphuricum
UNII-1K573LC5TV
K2SO4
Chemical Function
Viscosity modifier
Thickening agent
Crystal growth modifiers (nucleating agents)
Processing aids not otherwise specified
Flavouring and nutrient
Regulatory Lists
inert_ingredient; Pesticides
inert_ingredient; non_food_use; Pesticides
pharmaceutical
food_additive; Substances Added to Food (formerly EAFUS) (2/2019)
SCIL (9/2019)
Canada; pharmaceutical
Canada; pharmaceutical
pharmaceutical
inert_ingredient; Pesticides
Australian Status
AICIS status: listed
Cross-Vertical Safety Context
Same-CAS public records found in pharmaceutical data.
SOURCE
ChEMBL / DrugCentral / FAERS
DB_PHARMA CAS match
Pharmaceutical Data
Same-CAS rows from the pharmaceutical spoke database.
Compound
POTASSIUM SULFATE
ChEMBL ID
CHEMBL2021424
Max Phase
4
Adverse Event Associations
24
Frequently Asked Questions
Is Potassium Sulfate allowed in the EU?
Potassium Sulfate EU regulatory status: permitted. This is based on EU Regulation 1223/2009 and its amendments.
What does Potassium Sulfate do in cosmetics?
Potassium Sulfate functions as: Viscosity controlling. It is classified as a cosmetic ingredient in our database. CAS number: 7778-80-5.
Is Potassium Sulfate used outside cosmetics?
Potassium Sulfate also appears in industrial chemical safety and pharmaceutical data. The cross-vertical cards on this page render same-CAS public rows from the matched databases.
Does Potassium Sulfate have different safety status in cosmetics vs industrial chemicals?
Potassium Sulfate is classified GHS Danger (H318) in the chemicals database but is allowed in EU cosmetics.
Compliance Tools
Check Potassium Sulfate compliance across multiple jurisdictions:
Ingredient Decoder
Paste a full ingredient list for instant analysis
82 Allergen Checker
Check for EU declarable fragrance allergens
Substance Compliance
Check compliance across multiple jurisdictions
MoS Calculator
Calculate Margin of Safety using SCCS methodology
Heavy Metal Limits
Compare limits across jurisdictions
Related Ingredients
3-Hydroxybutyrate/3-Hydroxyhexanoate Copolymer
Excellent
Same category
Film Forming, Viscosity Controlling, ...
3-Hydroxybutyrate/4-Hydroxybutyrate Copolymer
Excellent
Same category
Film forming, viscosity controlling, ...
4-PCA Dimethicone/Bis-Vinyldimethicone Crosspolymer
Excellent
Same category
Film forming, hair conditioning, skin...
Acrylates Crosspolymer-3
Excellent
Same category
Bulking agent, chelating agent, emuls...
Acrylates Crosspolymer-4
Excellent
Same category
Emulsion stabilizer, film former, dis...
Acrylates Crosspolymer-6
Excellent
Same category
Film former, viscosity increasing age...
1-Methylhydantoin-2-imide (Creatinine)
Excellent
Similar safety
Skin conditioning (skin brightening/l...
2,6-Dimethyl-7-octen-2-ol (Dihydromyrcenol)
Excellent
Similar safety
Fragrance (perfuming), masking
2-Ethoxy-2,6,6-Trimethyl-9-Methylenebicyclo[3.3.1]Nonane (Boisiris™)
Excellent
Similar safety
Fragrance (rich woody, orris/iris roo...
2-Hydroxypropylcarbamato Amodimethicone
Excellent
Similar safety
Hair conditioning; modified aminosili...
2-O-Ethyl Ascorbic Acid
Excellent
Similar safety
Softener and conditioner
3 O Ethyl Ascorbic Acid
Excellent
Similar safety
Antioxidant; tyrosinase inhibitor; me...
CI 77231
Excellent
Chemical family
Colorant (white opacifier), Bulking a...
Calcium Hypochlorite
Poor
Chemical family
Oxidizing agent
Calcium Sulfate
Good
Chemical family
Abrasive, Bulking, Opacifying
Is Potassium Sulfate in Your Products?
Scan any product label with Piro — our free ingredient scanner. Point your camera at the ingredients list and get instant safety scores for every ingredient.
Try Piro Free →Analyze Your Full Ingredient List
Paste any INCI list into the Decoder for instant safety analysis, or calculate the Margin of Safety for Potassium Sulfate in your formulation.