- industrial
- pharma
Cysteamine hydrochloride
CAS 156-57-0
Also registered as 2 other CAS numbers
116962-86-8 · 2022216-63-1
Antioxidant · Hair waving or straightening · Reducing agent
Concern score
Not assessed — no hazard data yet.
What we know about this ingredient
Cysteamine hydrochloride is in the Greenveil catalog but has not been assessed — "Not assessed" means we have no published hazard evidence for it yet, not that it is safe.
Regulation
No restrictions found. Cysteamine hydrochloride appears in these published regulatory listings.
- In marketed US drugs
- Found in consumer products
- Industrial
USEPAcommercial use observedEPA CPDat observed this chemical in 0 composition records across product categories including unclassified products. EPA CPDat classifies this chemical for functional uses including Antioxidant, Reducing agent, Hair waving or straightening.
- EPA CPDat observed this chemical in 0 composition records across product categories including unclassified products. EPA CPDat classifies this chemical for functional uses including Antioxidant, Reducing agent, Hair waving or straightening.Source →
USFDAmarketed drug occurrenceFDA NDC lists this ingredient in 3 active drug products and 3 total products.
- FDA NDC lists this ingredient in 3 active drug products and 3 total products.Source →
USFDAlisted in openFDA substanceopenFDA substance registry classifies this ingredient as chemical.
- openFDA substance registry classifies this ingredient as chemical.Source →
Evidence & sources
No graded research studies for Cysteamine hydrochloride yet. This record is compiled from the published data sources below — registries and regulatory listings, not study findings.
Where this comes from
- Open →
EPA Chemical and Products Database
exposure · updated 2019-12-20
- Open →
EPA DSSTox Identifiers
chemistry · updated 2025-12-29
- Open →
FDA National Drug Code Directory
regulatory · updated 2026-12-31
- 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 (1)
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 FDA National Drug Code directory has listed Cysteamine hydrochloride in a product composition. These are source records, not Greenveil catalog products.
Source records
3
Typical roles
AntioxidantHair waving or straighteningReducing agent