What is the NOAEL for 4-Hydroxyacetophenone?
4-Hydroxyacetophenone has 6 NOAEL studies in the database. The lowest reported value is 2.8 mg/m3 via inhalation in Human. Source: ToxValDB_GESTIS_DNEL.
NOAEL Data
REACH Registered
Cosmetic Ingredient
4-Hydroxyacetophenone
Also known as: 4'-Hydroxyacetophenone (Ethanone, 1-(4-hydroxyphenyl)-), EINECS 202-802-8, HYDROXYACETOPHENONE, PARA, Methyl-p-hydroxyphenyl ketone, p-Oxyacetophenone (+6 more)
CAS 99-93-4
4-Hydroxyacetophenone (CAS 99-93-4) is a chemical substance. Key regulatory status: REACH registered, 5 regulatory/inventory lists, cosmetic ingredient cross-reference; source data from EPA ToxValDB, EPA CPDat, AICIS, ECHA REACH.
SOURCE
noael studies public
NOAEL studies
6
SOURCE
chemical inventory jurisdictions
Regulatory lists
5
SOURCE
eu clp annex vi
GHS signal
Not classified
Chemical Identity
CAS, identifiers, formula, and alternate names for the matched substance record.
SOURCE
DSSTox identifiers
17 fields
Name
4-Hydroxyacetophenone
CAS Number
99-93-4
DTXSID
DTXSID0029133
Molecular Formula
C8H8O2
InChI Key
TXFPEBPIARQUIG-UHFFFAOYSA-N
Monoisotopic Mass
136.052429
Synonyms
4'-Hydroxyacetophenone (Ethanone, 1-(4-hydroxyphenyl)-)EINECS 202-802-8HYDROXYACETOPHENONE, PARAMethyl-p-hydroxyphenyl ketonep-OxyacetophenonePhenol, p-acetyl-4-HydroksyacetofenolUNII-G1L3HT4CMH(4-Hydroxyphenyl)ethan-1-onep-Hydroxyacetophenonepara-Hydroxyacetophenone
Functional Uses
Industrial and product-use categories associated with this substance.
SOURCE
EPA CPDat
7 records
AntioxidantFlavouring and nutrientFragrancePreservative
Regulatory Lists
Inventory, screening, and regulatory list matches from public chemical databases.
SOURCE
EPA CPDat
5 records
| List | Keyword | Source |
|---|---|---|
| IFRA Transparency | IFRA | IFRA |
| IFRA Transparency | IFRA | IFRA |
| Europe | European Commission | Fl@vis |
| food_additive; Substances Added to Food (formerly EAFUS) (2/2019) | FDA | United States Food and Drug Administration (FDA) |
| SCIL (9/2019) | USEPA | Safer Chemical Ingredients List |
NOAEL Studies
Toxicology endpoints rendered from public NOAEL study rows.
SOURCE
NOAEL studies
Showing 6 of 6 studies
| Value | Unit | Endpoint | Route | Species | Source |
|---|---|---|---|---|---|
| =2.8 | mg/m3 | DNEL local | inhalation | Human | ToxValDB_GESTIS_DNEL |
| G1L3HT4CMH | UNII | FDA UNII substance identifier | - | - | openFDA substances |
| G1L3HT4CMH | UNII | FDA UNII substance identifier | - | - | openFDA substances |
| G1L3HT4CMH | UNII | FDA UNII substance identifier | - | - | openFDA substances |
| G1L3HT4CMH | UNII | FDA UNII substance identifier | - | - | openFDA substances |
| - | unitless | Model Score | - | - | NTP_ICE_endocrine |
Showing 6 of 6 studies
REACH Registration
Registration status from the ECHA REACH registered substances database.
SOURCE
ECHA (EU)
1 records
| Status | Name | EC Number | Link |
|---|---|---|---|
| Registered | 4'-hydroxyacetophenone | 202-802-8 | ECHA overview → |
Australian Status (AICIS)
Australian industrial chemicals inventory status and applicable conditions.
SOURCE
AICIS inventory
1 records
Inventory Status
listed
Cosmetic Safety Profile
Same-CAS cosmetic ingredient record for cross-vertical context.
SOURCE
CosIng / Ingredients DB
EU Status
permitted
Max
-
Category
preservative
Pharmaceutical Data
Same-CAS pharmaceutical records from drug and bioactivity sources.
SOURCE
EMBL-EBI ChEMBL
4-HYDROXYACETOPHENONE
ChEMBL Phase
Not listed
Adverse Events
0
Bioactivity
3
Food Safety Data
Same-CAS food additive, ADI, and GRAS records where available.
SOURCE
EFSA / FDA GRAS
1 records
ADI: No safety concern at current levels of intake when used as a flavouring agent mg/kg bw
View full food safety profile →Cannabis Data
Same-CAS cannabis compliance and lab records where available.
SOURCE
Cannabis regulatory / lab data
efsa substances
1 cannabis record found in efsa substances.
View full cannabis profile →Frequently Asked Questions
What regulatory lists include 4-Hydroxyacetophenone?
4-Hydroxyacetophenone appears on 4 regulatory/inventory lists including IFRA Transparency, Europe, food_additive; Substances Added to Food (formerly EAFUS) (2/2019), and 1 more. Source: EPA CPDat.
Is 4-Hydroxyacetophenone used in cosmetics?
Yes, 4-Hydroxyacetophenone is also indexed as a cosmetic ingredient under the name Hydroxyacetophenone. 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 4-Hydroxyacetophenone come from?
Safety data is sourced from EPA ToxValDB, EPA CPDat, AICIS (Australian Industrial Chemicals Introduction Scheme), EPA DSSTox, ECHA REACH, CosIng / Ingredients DB, ChEMBL / DailyMed, EFSA / FDA GRAS, cannabis regulatory/lab databases. All data traces to primary regulatory sources and is updated from official government databases.
Is 4-Hydroxyacetophenone used outside industrial chemicals?
4-Hydroxyacetophenone also appears in cosmetics, pharmaceutical, food safety, cannabis databases.