- beauty
Guanidine carbonate
CAS 3425-08-9
Also registered as 2 other CAS numbers
90332-86-8 · 593-85-1
Concern score
Not assessed — no hazard data yet.
Guanidine carbonate in plain language
Also known as Carbonic acid, compd. with guanidine (1:2) · Carbonic acid--guanidine (1/2) · carbonic acid;bis(guanidine) · Bisguanidinium carbonate · Diguanidinium carbonate · Diguanidiniumcarbonat
Show all 16 names
Ec 209-813-7 · Guanidine carbonate (2:1) · Guanidine carbonate salt · Guanidinecarbonate · Guanidinium carbonate · Tuxrbqhzzfvxlv-uhfffaoysa-n · UNII-V3394X3G2W · bis carbonate · carbonic acid;guanidine · guanidiniumcarbonat
Used in cosmetics as a skin-conditioning agent and a pH buffer.
- Skin conditioning
- Buffering
- pH adjuster
- Conditioner
- Hair waving/straightening
- We haven't assessed a concern score for this ingredient yet. It is listed for cosmetic use in the EU.
Regulation
No restrictions found. Guanidine carbonate appears in these published regulatory listings.
- Found in consumer products
- Beauty
EUCosIngActiveListed in CosIng inventory for cosmetic use.
- Listed in CosIng inventory for cosmetic use.Source →
USEPAcommercial use observedEPA CPDat observed this chemical in 40 composition records across product categories including Personal care. EPA CPDat classifies this chemical for functional uses including Softener and conditioner, pH regulating agent, Hair waving or straightening.
- EPA CPDat observed this chemical in 40 composition records across product categories including Personal care. EPA CPDat classifies this chemical for functional uses including Softener and conditioner, pH regulating agent, Hair waving or straightening.Source →
USFDAlisted in openFDA substanceopenFDA substance registry classifies this ingredient as chemical.
- openFDA substance registry classifies this ingredient as chemical.Source →
Expert safety opinions
No expert opinion on file for Guanidine carbonate. These are the independent scientific bodies that assess ingredients like this one; we show an opinion only when a record we hold cites it.
SCCS
EU Scientific Committee on Consumer Safety
No SCCS opinion on file.
CIR
Cosmetic Ingredient Review (US expert panel)
No CIR safety assessment on file.
Evidence & sources
No graded research studies for Guanidine carbonate yet. This record is compiled from the published data sources below — registries and regulatory listings, not study findings.
Where this comes from
- Open →
CosIng
regulatory · updated 2026-09-23
- Open →
EPA Chemical and Products Database
exposure · updated November 2016
- Open →
EPA DSSTox Identifiers
chemistry · updated 2025-12-29
- Open →
FDA GSRS UNII
registry · updated 2026-02-26
- Open →
openFDA Substance
registry · updated 2026-05-24
- Open →
PubChem Live Enrichment
chemistry · updated 2026-05-17
Reference links (2)
chemblink.com
Suitability
Context-specific fit derived from published classifications and the current ingredient evidence profile.
Fragrance avoidance
Nothing to weigh for this context yet.
We have no published hazard signal for this ingredient, so we cannot say how it behaves in this context — that is missing evidence, not a clean result.
Where it has been recorded
How often EPA CPDat has listed Guanidine carbonate in a product composition. These are source records, not Greenveil catalog products.
Source records
40
Named organisations
6
Personal care
Typical roles
Skin conditioningBufferingpH adjusterConditionerHair waving/straightening
Found in these products
Cosmetic and personal-care products that list Guanidine carbonate are shown first. Their ingredient lists include Guanidine carbonate; each product's own rating depends on its whole formula, so it is shown on the product page, not here.
