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463-51-4

Basic Information
CAS No.: 463-51-4
Name: Ethenone
Molecular Structure:
Molecular Structure of 463-51-4 (Ethenone)
Formula: C2H2O
Molecular Weight: 42.04
Synonyms: Ketene(8CI);Carbomethene;
EINECS: 207-336-9
Density: 0.712 g/cm3
Melting Point: -150°
Boiling Point: bp -56°
Flash Point:
Solubility:
Appearance: COLOURLESS GAS, WITH CHARACTERISTIC ODOUR
Hazard Symbols:
Risk Codes:
Safety:
Transport Information:
PSA: 17.07000
LogP: 0.00400
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*Required Fields

Consensus Reports

Reported in EPA TSCA Inventory. EPA Genetic Toxicology Program.

Standards and Recommendations

OSHA PEL: TWA 0.5 ppm; STEL 1.5 ppm
ACGIH TLV: TWA 0.5 ppm; STEL 1.5 ppm
DFG MAK: 0.5 ppm (0.87 mg/m3)

Specification

The IUPAC name of this chemical is ethenone. With the CAS registry number 463-51-4 and EINECS registry number 207-336-9, it is also named as ketene. In addition, it is an organic compound which was first studied as a class by Hermann Staudinger. It mainly used in the manufacture of acetic anhydride and acetylation reagent. What's more, it should be stored in sealed container, and put in a cool and dry place.

Physical properties about this chemical are: (1)ACD/LogP: 0.11; (2)ACD/LogD (pH 5.5): 0.11; (3)ACD/LogD (pH 7.4): 0.11; (4)ACD/BCF (pH 5.5): 1; (5)ACD/BCF (pH 7.4): 1; (6)ACD/KOC (pH 5.5): 27.4; (7)ACD/KOC (pH 7.4): 27.4; (8)#H bond acceptors: 1; (9)Polar Surface Area: 17.07 Å2; (10)Index of Refraction: 1.303; (11)Molar Refractivity: 11.15 cm3; (12)Molar Volume: 58.9 cm3; (13)Polarizability: 4.42 ×10-24cm3; (14)Surface Tension: 3.5 dyne/cm; (15)Density: 0.712 g/cm3; (16)Enthalpy of Vaporization: 20.2 kJ/mol; (17)Vapour Pressure: 12600 mmHg at 25°C.

Preparation of ketene: it can be formed by pyrolysis (thermal cracking) of acetone: CH3−CO−CH3 + ΔT → CH2=C=O + CH4. In addition, it can also be formed from α-diazoketones by Wolff rearrangement.

Uses of ketene: it can react with hexan-1-ol to get 1-acetoxy-hexane. This reaction will need reagent MgO. The reaction time is 1 hour with ambient temperature. The yield is about 86%.

ketene can react with hexan-1-ol to get 1-acetoxy-hexane

When you are using this chemical, please be cautious about it as the following:
This chemical irritats eyes, skin, nose, throat and respiratory system. When you are using it, wear suitable protective clothing, gloves and eye/face protection. In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.

You can still convert the following datas into molecular structure:
(1)SMILES: O=C=C
(2)Std. InChI: InChI=1S/C2H2O/c1-2-3/h1H2
(3)Std. InChIKey: CCGKOQOJPYTBIH-UHFFFAOYSA-N

The toxicity data is as follows:

Organism Test Type Route Reported Dose (Normalized Dose) Effect Source
cat LCLo inhalation 750ppm/10M (750ppm) LUNGS, THORAX, OR RESPIRATION: ACUTE PULMONARY EDEMA

LUNGS, THORAX, OR RESPIRATION: OTHER CHANGES

GASTROINTESTINAL: CHANGES IN STRUCTURE OR FUNCTION OF SALIVARY GLANDS
Journal of Industrial Hygiene and Toxicology. Vol. 31, Pg. 209, 1949.
guinea pig LCLo inhalation 53ppm/2H (53ppm) LUNGS, THORAX, OR RESPIRATION: ACUTE PULMONARY EDEMA

LUNGS, THORAX, OR RESPIRATION: OTHER CHANGES
Journal of Industrial Hygiene and Toxicology. Vol. 31, Pg. 209, 1949.
monkey LCLo inhalation 200ppm/10M (200ppm) SENSE ORGANS AND SPECIAL SENSES: PTOSIS: EYE

LUNGS, THORAX, OR RESPIRATION: ACUTE PULMONARY EDEMA

LUNGS, THORAX, OR RESPIRATION: OTHER CHANGES
Journal of Industrial Hygiene and Toxicology. Vol. 31, Pg. 209, 1949.
mouse LCLo inhalation 23ppm/30M (23ppm) BEHAVIORAL: CONVULSIONS OR EFFECT ON SEIZURE THRESHOLD

LUNGS, THORAX, OR RESPIRATION: DYSPNEA
Journal of Industrial Hygiene and Toxicology. Vol. 31, Pg. 209, 1949.
rabbit LCLo inhalation 53ppm/2H (53ppm) LUNGS, THORAX, OR RESPIRATION: ACUTE PULMONARY EDEMA

LUNGS, THORAX, OR RESPIRATION: OTHER CHANGES
Journal of Industrial Hygiene and Toxicology. Vol. 31, Pg. 209, 1949.