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Octafluoro-sec-butene

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Name

Octafluoro-sec-butene

EINECS N/A
CAS No. 382-21-8 Density 1.521g/cm3
PSA 0.00000 LogP 3.26160
Solubility N/A Melting Point -130°C
Formula C4F8 Boiling Point 1.2°Cat760mmHg
Molecular Weight 200.031 Flash Point °C
Transport Information N/A Appearance N/A
Safety A deadly poison by inhalation. A skin, eye, and mucous membrane irritant. Human acute exposure causes marked irritation of conjunctivae, throat, and lungs. When heated to decomposition it emits toxic fumes of F. See also FLUORIDES. Risk Codes N/A
Molecular Structure Molecular Structure of 382-21-8 (Perfiuoroisobutylene) Hazard Symbols A poison by inhalation. A skin, eye, and mucous membrane irritant. TLV: ceiling of 0.01 ppm.
Synonyms

Propene,pentafluoro-2-(trifluoromethyl)- (6CI,7CI,8CI);1,1,3,3,3-Pentafluoro-2-(trifluoromethyl)propene; 1,1-Difluoro-2,2-bis(trifluoromethyl)ethene;Octafluoroisobutene; Octafluoroisobutylene; PFIB;Perfluoro-2-(trifluoromethyl)propene; Perfluoro-2-methylpropene;Perfluoroisobutene; Perfluoroisobutylene

Article Data 39

Octafluoro-sec-butene Chemical Properties

IUPAC Name: 1,1,3,3,3-Pentafluoro-2-(trifluoromethyl)prop-1-ene
Synonyms of Octafluoro-sec-butene (CAS NO.382-21-8) : 1,1,3,3,3-Pentafluor-2-(trifluormethyl)-1-propen ; 1,1,3,3,3-Pentafluoro-2-(trifluoromethyl)prop-1-ene ; 1-Propene, 1,1,3,3,3-pentafluoro-2-(trifluoromethyl)- ; Perfluoroisobutene
InChI:InChI=1/C4F8/c5-2(6)1(3(7,8)9)4(10,11)12
CAS NO:382-21-8
Molecular Formula:C4F8
Molecular Weight :200.03
Molecular Structure :
Index of Refraction:1.26
Surface Tension: 10.5 dyne/cm
Density: 1.521 g/cm3
Enthalpy of Vaporization: 24.01 kJ/mol
Boiling Point: 1.2 °C at 760 mmHg
Vapour Pressure: 1740 mmHg at 25°C

Octafluoro-sec-butene Production

Preparation Products: Hexafluoroacetone

 Octafluoro-sec-butene (CAS NO.382-21-8) is a product of pyrolysis of polytetrafluoroethylene (PTFE), one of the substances causing polymer fume fever.

Octafluoro-sec-butene Toxicity Data With Reference

Organism Test Type Route Reported Dose (Normalized Dose) Effect Source
cat LCLo inhalation 25mg/m3/2H (25mg/m3) BEHAVIORAL: SOMNOLENCE (GENERAL DEPRESSED ACTIVITY)

BEHAVIORAL: EXCITEMENT

BEHAVIORAL: ATAXIA
Trudy Leningradskogo Sanitarno-Gigienicheskogo Meditsinskogo Instituta. Vol. 75, Pg. 221, 1963.
guinea pig LC50 inhalation 1050ppb/2H (1.05ppm) BEHAVIORAL: SOMNOLENCE (GENERAL DEPRESSED ACTIVITY)

LUNGS, THORAX, OR RESPIRATION: RESPIRATORY DEPRESSION
Biologie Medicale Vol. 57, Pg. 247, 1968.
mouse LCLo inhalation 10mg/m3/2H (10mg/m3) LUNGS, THORAX, OR RESPIRATION: EMPHYSEMA

KIDNEY, URETER, AND BLADDER: "CHANGES IN TUBULES (INCLUDING ACUTE RENAL FAILURE, ACUTE TUBULAR NECROSIS)"

BLOOD: HEMORRHAGE
Gigiena Truda i Professional'nye Zabolevaniya. Labor Hygiene and Occupational Diseases. Vol. 5(3), Pg. 3, 1961.
rabbit LC50 inhalation 1200ppb/2H (1.2ppm) BEHAVIORAL: SOMNOLENCE (GENERAL DEPRESSED ACTIVITY)

LUNGS, THORAX, OR RESPIRATION: RESPIRATORY DEPRESSION
Biologie Medicale Vol. 57, Pg. 247, 1968.
rat LC50 inhalation 500ppb/6H (0.5ppm)   "Toxicology of Drugs and Chemicals," Deichmann, W.B., New York, Academic Press, Inc., 1969Vol. -, Pg. 310, 1969.

Octafluoro-sec-butene Safety Profile

A deadly poison by inhalation. A skin, eye, and mucous membrane irritant. Human acute exposure causes marked irritation of conjunctivae, throat, and lungs. When heated to decomposition it emits toxic fumes of F. See also FLUORIDES.

RIDADR 3162
HazardClass 2.3

Octafluoro-sec-butene Standards and Recommendations

ACGIH TLV: CL 0.01 ppm

Octafluoro-sec-butene Specification

Perfluoroisobutene (PFIB), also known as 1,1,3,3,3-pentafluoro-2-(trifluoromethyl)prop-1-ene, is a fluorocarbon olefine. It is a hydrophobic reactive gas with boiling point at 7 °C. It is a strong electrophile.

PFIB is about 10 times as toxic as phosgene. Its inhalation can lead to pulmonary edema, which may be fatal. Onset of symptoms can take 1-4 hours after inhalation. Treatment is based on management of the pulmonary edema (usually with high-dose corticoids and other medication/measures) and associated disorders (e.g. heart failure, hypocalcemia etc.). Many cases resolve within 72 hours without major long-term effects.

In contact with water PFIB undergoes rapid hydrolysis, producing various reactive compounds and fluorophosgene.

 Octafluoro-sec-butene (CAS NO.382-21-8) is a Schedule 2 substance of the Chemical Weapons Convention.

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