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Chemical substance record

Chloral hydrate

302-17-0C2H3Cl3O2165.403 g/mol

An organochlorine compound that is the hydrate of trichloroacetaldehyde. — ChEBI

Safety references

Safety documents & references

1 indexed references
JP · NITE

Government GHS classification

H30-C-016-MHLW · FY2018

View classification

Find a product-specific SDS

Safety guides and government classification records are not a manufacturer’s SDS. Match supplier, product number, concentration, physical form, region and revision before using a document.

Identity & molecular properties

Source-linked values
CAS number302-17-0ChEBI ↗
Molecular formulaC2H3Cl3O2ChEBI ↗
Molar mass165.403 g/molChEBI ↗
Monoisotopic mass163.91986 DaChEBI ↗
Formal charge0ChEBI ↗
ChEBI identifierCHEBI:28142ChEBI ↗

Cross-source molecular data

PubChem
Molar mass165.40 g/molPubChem ↗
Exact mass163.919862 DaPubChem ↗
Computed XLogP1PubChem ↗
Topological polar surface area (Ų)40.5PubChem ↗
H-bond donors2PubChem ↗
H-bond acceptors2PubChem ↗
Rotatable bonds0PubChem ↗

PubChem computed values are shown separately from the ChEBI record. An exact InChIKey match was used to connect the records. Molecular descriptors do not describe a supplied product’s purity, particle size or performance.

Names & structural identifiers

Copy any identifier
chloral hydrate
2,2,2-trichloroethane-1,1-diol
RNFNDJAIBTYOQL-UHFFFAOYSA-N
OC(O)C(Cl)(Cl)Cl
InChI=1S/C2H3Cl3O2/c3-2(4,5)1(6)7/h1,6-7H

Names & synonyms

2,2,2-trichloroethane-1,1-diolAquachloral SupprettesNoctecSomnote

Names are supplied by ChEBI. Trade names and related synonyms may describe a broader product context.

Classification & relationships

ChEBI ontology

Roles recorded in ChEBI

antidepressantanxiolytic drugantipsychotic agentxenobioticsedativegeneral anaestheticmouse metabolite

Database role annotations describe reported biological or chemical roles; they are not product approvals or recommendations for use.

Safety classification · Japan

NITE / Japanese government
Japan · FY2018 source classification
Chloral hydrate · H30-C-016-MHLW
EndpointReported classification
CarcinogenicityCategory 1B

Selected source-reported endpoints. Other endpoints, rationales and conditions remain in the original classification. Missing or unlisted information does not mean non-hazardous. This is not a global classification or transport decision.

Read the original NITE classification

Mass ↔ amount of substance

Calculated from sourced mass
Equivalent amount
0.00604584 mol

Uses 165.403 g/mol from ChEBI. Assumes the substance described by this record; no purity or concentration correction is applied.

Elemental composition

Theoretical mass fractions
Cl
Chlorine · 3 atoms
64.30%
O
Oxygen · 2 atoms
19.35%
C
Carbon · 2 atoms
14.52%
H
Hydrogen · 3 atoms
1.83%

Calculated theoretical mass fractions from the reported formula and PubChem periodic-table atomic masses. These are not assay or purity results.

Research & patent references

Selected source associations

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Sources & record history

Checked 27 Sep 2026
EMBL-EBI ChEBI · CHEBI:28142

Release 255, 9 September 2026. ChEBI three-star (manually annotated) source entry. View original record ↗ · CC BY 4.0

NCBI PubChem · CID 2707 · retrieved 2026-09-27

PubCAS formats source data, connects references and computes explicitly labelled conversions. CAS cross-references are supplied by ChEBI; they do not constitute CAS verification or endorsement.