2-Chloro-4-{(E)-[3-(methylsulfanyl)-1,2,4-thiadiazol-5-yl]diazenyl}phenol (CAS 1444596-49-9) is a chemical substance. Key regulatory status: cosmetic ingredient cross-reference; source data from EPA ToxValDB, AICIS, SCCS.
Toxicology endpoints rendered from public NOAEL study rows.
SOURCENOAEL studiesShowing 50 of 51 studies
Value
Unit
Endpoint
Route
Species
Source
=0.013
mg/kg bw
NOAEL
oral
rat
SCCS_vision_codex
=0.013
mg/kg bw
NOAEL
oral
rat
SCCS_vision_codex
=0.013
mg/kg bw
NOAEL
oral
rat
SCCS_vision_codex
=0.013
mg/kg bw
NOAEL
oral
rat
SCCS_vision_codex
=0.022
mg/kg bw
NOAEL
oral
rat
SCCS_vision_codex
=0.022
mg/kg bw
NOAEL
oral
rat
SCCS_vision_codex
=0.022
mg/kg bw
NOAEL
oral
rat
SCCS_vision_codex
=0.022
mg/kg bw
NOAEL
oral
rat
SCCS_vision_codex
=2.31
mg/kg bw/d
NOAEL
oral
rat
SCCS_vision_codex
=2.31
mg/kg bw/d
NOAEL
oral
rat
SCCS_vision_codex
=2.31
mg/kg bw/d
NOAEL
oral
rat
SCCS_vision_codex
=2.31
mg/kg bw/d
NOAEL
oral
rat
SCCS_vision_codex
=3
mg/kg bw/day
NOAEL
oral
rat
SCCS_vision_codex
=3
mg/kg/day
NOAEL
-
rat
SCCS_vision_codex
=3
mg/kg bw/d
NOAEL
oral
rat
SCCS_vision_codex
=3
mg/kg bw/day
NOAEL
oral
rat
SCCS_vision_codex
=3
mg/kg/day
NOAEL
-
rat
SCCS_vision_codex
=3
mg/kg bw/d
NOAEL
oral
rat
SCCS_vision_codex
=3
mg/kg bw/day
NOAEL
oral
rat
SCCS_vision_codex
=3
mg/kg/day
NOAEL
-
rat
SCCS_vision_codex
=3
mg/kg bw/d
NOAEL
oral
rat
SCCS_vision_codex
=3
mg/kg bw/day
NOAEL
oral
rat
SCCS_vision_codex
=3
mg/kg/day
NOAEL
-
rat
SCCS_vision_codex
=3
mg/kg bw/d
NOAEL
oral
rat
SCCS_vision_codex
=50
mg/kg bw/day
NOAEL
-
rat
SCCS_vision_codex
=50
mg/kg bw/day
NOAEL
-
rat
SCCS_vision_codex
=50
mg/kg bw/day
NOAEL
-
rat
SCCS_vision_codex
=50
mg/kg bw/day
NOAEL
-
rat
SCCS_vision_codex
=77
%
NOAEL
oral
rat
SCCS_vision_codex
=77
%
NOAEL
oral
rat
SCCS_vision_codex
=77
%
NOAEL
oral
rat
SCCS_vision_codex
=77
%
NOAEL
oral
rat
SCCS_vision_codex
=100
mg/kg bw/day
NOAEL
oral
rat
SCCS_vision_codex
=100
mg/kg bw/day
NOAEL
oral
rat
SCCS_vision_codex
=100
mg/kg bw/day
NOAEL
oral
rat
SCCS_vision_codex
=100
mg/kg bw/day
NOAEL
oral
rat
SCCS_vision_codex
=0.013
mg/kg bw
dermal absorption
oral
rat
UnifiedCodex:SCCS_SHADOW:beta.noael_studies
=2.31
mg/kg bw/d
dermal absorption
oral
rat
UnifiedCodex:SCCS_SHADOW:beta.noael_studies
=3
mg/kg bw/d
dermal absorption
oral
rat
UnifiedCodex:SCCS_SHADOW:beta.noael_studies
3
mg/kg bw/day
developmental toxicity
oral
rat
UnifiedCodex:SCCS_SHADOW:beta.noael_studies
50
mg/kg bw/day
developmental toxicity
-
rat
UnifiedCodex:SCCS_SHADOW:beta.noael_studies
50
mg/kg bw/day
developmental toxicity
oral
rat
UnifiedCodex:SCCS_SHADOW:beta.noael_studies
50
mg/kg bw/day
developmental toxicity
oral
rat
UnifiedCodex:SCCS_SHADOW:beta.noael_studies
3
mg/kg bw/day
genotoxicity
oral
rat
UnifiedCodex:SCCS_SHADOW:beta.noael_studies
3
mg/kg bw/day
genotoxicity
oral
rat
UnifiedCodex:SCCS_SHADOW:beta.noael_studies
3
mg/kg bw/day
genotoxicity
oral
rat
UnifiedCodex:SCCS_SHADOW:beta.noael_studies
77
%
irritation
oral
rat
UnifiedCodex:SCCS_SHADOW:beta.noael_studies
3
mg/kg/day
repeated dose toxicity
-
rat
UnifiedCodex:SCCS_SHADOW:beta.noael_studies
3
mg/kg/day
repeated dose toxicity
oral
rat
UnifiedCodex:SCCS_SHADOW:beta.noael_studies
77
%
repeated dose toxicity
oral
rat
UnifiedCodex:SCCS_SHADOW:beta.noael_studies
Showing 50 of 51 studies
Australian Status (AICIS)
Australian industrial chemicals inventory status and applicable conditions.
SOURCEAICIS inventory1 records
Inventory Status
listed_with_terms
Conditions
Specific information requirements: Obligations to provide information apply. You must tell us within 28 days if the circumstances of your importation or manufacture (introduction) are different to those in our assessment.
SCCS Opinions
EU Scientific Committee opinions tied to the matched substance.
SOURCEEU SCCS2 opinions
Opinion
Date
Conclusion
Max Conc.
Concerns
SCCS/1673/24
22 January 2025
safe with restrictions
1.5% oxidative / 0.5% non-oxidative
sensitization
SCCS/1569/15
16 March 2016
insufficient data
-
purity inadequately quantified
Cosmetic Safety Profile
Same-CAS cosmetic ingredient record for cross-vertical context.
What is the NOAEL for 2-Chloro-4-{(E)-[3-(methylsulfanyl)-1,2,4-thiadiazol-5-yl]diazenyl}phenol?
2-Chloro-4-{(E)-[3-(methylsulfanyl)-1,2,4-thiadiazol-5-yl]diazenyl}phenol has 51 NOAEL studies in the database. The lowest reported value is 0.013 mg/kg bw via oral in rat. Source: SCCS_vision_codex.
Is 2-Chloro-4-{(E)-[3-(methylsulfanyl)-1,2,4-thiadiazol-5-yl]diazenyl}phenol used in cosmetics?
Yes, 2-Chloro-4-{(E)-[3-(methylsulfanyl)-1,2,4-thiadiazol-5-yl]diazenyl}phenol is also indexed as a cosmetic ingredient under the name HC Red No. 18. View the full cosmetic safety profile on the ingredient page for detailed safety data, SCCS opinions, and regulatory status.
Where does the safety data for 2-Chloro-4-{(E)-[3-(methylsulfanyl)-1,2,4-thiadiazol-5-yl]diazenyl}phenol come from?
Safety data is sourced from EPA ToxValDB, AICIS (Australian Industrial Chemicals Introduction Scheme), EPA DSSTox, CosIng / Ingredients DB. All data traces to primary regulatory sources and is updated from official government databases.
Is 2-Chloro-4-{(E)-[3-(methylsulfanyl)-1,2,4-thiadiazol-5-yl]diazenyl}phenol used outside industrial chemicals?
2-Chloro-4-{(E)-[3-(methylsulfanyl)-1,2,4-thiadiazol-5-yl]diazenyl}phenol also appears in cosmetics databases.