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HCID 18632Erstellt: 27. Oktober 2026

2,3-Epoxybutan

2,3-DIMETHYLOXIRANE · 2,3-EPOXYBUTANE · beta-Oxybutene · 2-BUTENE OXIDE · 2,3-epoxy-butan · 2-Butene epoxide · 2-buteneexpoxide · 2-Butene expoxide

https://huagongshe.com/de/chemical/18632

Molekülstruktur von 2,3-Epoxybutan

Identifikatoren & physikalische Daten

CAS No.	3266-23-7
Summenformel	C4H8O
Durchschnittliche Molmasse	72,11 g/mol
Monoisotopische Masse	72,05751487 g/mol
SMILES	CC1OC1C
InChIKey	PQXKWPLDPFFDJP-UHFFFAOYSA-N
PubChem CID	18632
EC No.	221-877-8
DTXSID	DTXSID5025239
Lokaler Name	2,3-Epoxybutan

Chemische & physikalische Eigenschaften

XLogP	0,7
Polarare Oberfläche (TPSA)	12,5
H-Brücken-Donoren	0
H-Brücken-Akzeptoren	1
Frei drehbare Bindungen	0
Schwere Atome	5
Formalladung	0
Komplexität	36
Dichte	0.793 at 75 °F (NTP, 1992) - Less dense than waterwill float0.804 g/mL at 20 °C(lit.)
Löslichkeit	greater than or equal to 100 mg/mL at 68 °F (NTP, 1992)
Flammpunkt	0 °F (NTP, 1992)-15°C
Physical Description	2,3-epoxybutane is a clear colorless liquid. (NTP, 1992)
Kovats Retention Index	511512539
Siedepunkt	56~57℃
Brechungsindex	1.3740-1.3810
Wichte	0.810
CAS Datenbank	3266-23-7(CAS DataBase Reference)
NIST chemische Informationen	Oxirane, 2,3-dimethyl-(3266-23-7)
EPA chemische Informationen	2,3-Epoxybutane (3266-23-7)

Sicherheit & Vorschriften

GHS-Einstufung	DangerH225 (100%): Highly Flammable liquid and vapor [Danger Flammable liquids]H312 (67.9%): Harmful in contact with skin [Warning Acute toxicity, dermal]H315 (99.4%): Causes skin irritation [Warning Skin corrosion/irritation]H319 (99.4%): Causes serious eye irritation [Warning Serious eye damage/eye irritation]H335 (91.7%): May cause respiratory irritation [Warning Specific target organ toxicity, single exposureRespiratory tract irritation]H351 (66.7%): Suspected of causing cancer [Warning Carcinogenicity]P203, P210, P233, P240, P241, P242, P243, P261, P264, P264+P265, P271, P280, P302+P352, P303+P361+P353, P304+P340, P305+P351+P338, P317, P318, P319, P321, P332+P317, P337+P317, P362+P364, P370+P378, P403+P233, P403+P235, P405, and P501 (click each P-code to see the statement)Aggregated GHS information provided per 156 reports by companies from 6 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.Information may vary between notifications depending on impurities, additives, and other factors. The percentage value in parenthesis indicates the notified classification ratio from companies that provide hazard codes. Only hazard codes with percentage values above 10% are shown. For more detailed information, please visit ECHA C&L website.
Regulatorische Informationen	Chemical: Oxirane, 2,3-dimethyl-Status: Active Update: 16-03-2017 https://echa.europa.eu/registration-dossier/-/registered-dossier/17018
DOT-Kennzeichnung	Flammable Liquid
Brandgefahren	This chemical is flammable. (NTP, 1992)
Gesundheitsgefahren	Excerpt from ERG Guide 127 [Flammable Liquids (Water-Miscible)]:Inhalation or contact with material may irritate or burn skin and eyes. Fire may produce irritating, corrosive and/or toxic gases. Vapors may cause dizziness or asphyxiation, especially when in closed or confined areas. Runoff from fire control or dilution water may cause environmental contamination. (ERG, 2024)
Reaktive Gruppe	EpoxidesPolymerizable Compounds

Reactivity Profile	Epoxides, such as 2,3-EPOXYBUTANE, are highly reactive. They polymerize in the presence of catalysts or when heated. These polymerization reactions can be violent. Compounds in this group react with acids, bases, and oxidizing and reducing agents. They react, possibly violently with water in the presence of acid and other catalysts.

Erste Hilfe

EYES: First check the victim for contact lenses and remove if present. Flush victim's eyes with water or normal saline solution for 20 to 30 minutes while simultaneously calling a hospital or poison control center. Do not put any ointments, oils, or medication in the victim's eyes without specific instructions from a physician. IMMEDIATELY transport the victim after flushing eyes to a hospital even if no symptoms (such as redness or irritation) develop.SKIN: IMMEDIATELY flood affected skin with water while removing and isolating all contaminated clothing. Gently wash all affected skin areas thoroughly with soap and water. If symptoms such as redness or irritation develop, IMMEDIATELY call a physician and be prepared to transport the victim to a hospital for treatment.INHALATION: IMMEDIATELY leave the contaminated areatake deep breaths of fresh air. If symptoms (such as wheezing, coughing, shortness of breath, or burning in the mouth, throat, or chest) develop, call a physician and be prepared to transport the victim to a hospital. Provide proper respiratory protection to rescuers entering an unknown atmosphere. Whenever possible, Self-Contained Breathing Apparatus (SCBA) should be usedif not available, use a level of protection greater than or equal to that advised under Protective Clothing.INGESTION: DO NOT INDUCE VOMITING. Volatile chemicals have a high risk of being aspirated into the victim's lungs during vomiting which increases the medical problems. If the victim is conscious and not convulsing, give 1 or 2 glasses of water to dilute the chemical and IMMEDIATELY call a hospital or poison control center. IMMEDIATELY transport the victim to a hospital. If the victim is convulsing or unconscious, do not give anything by mouth, ensure that the victim's airway is open and lay the victim on his/her side with the head lower than the body. DO NOT INDUCE VOMITING. IMMEDIATELY transport the victim to a hospital. (NTP, 1992)

Freisetung ohne Brand

SMALL SPILLS AND LEAKAGE: If you spill this chemical, FIRST REMOVE ALL SOURCES OF IGNITION. Then, use absorbent paper to pick up all liquid spill material. Seal the absorbent paper, as well as any of your clothing which may be contaminated, in a vapor-tight plastic bag for eventual disposal. Wash any surfaces you may have contaminated with a soap and water solution. Do not reenter the contaminated area until the Safety Officer (or other responsible person) has verified that the area has been properly cleaned.STORAGE PRECAUTIONS: You should store this chemical in an explosion-proof refrigerator, and protect it from moisture. STORE AWAY FROM SOURCES OF IGNITION. (NTP, 1992)

Isolation and Evacuation

Excerpt from ERG Guide 127 [Flammable Liquids (Water-Miscible)]:IMMEDIATE PRECAUTIONARY MEASURE: Isolate spill or leak area for at least 50 meters (150 feet) in all directions.LARGE SPILL: Consider initial downwind evacuation for at least 300 meters (1000 feet).FIRE: If tank, rail tank car or highway tank is involved in a fire, ISOLATE for 800 meters (1/2 mile) in all directionsalso, consider initial evacuation for 800 meters (1/2 mile) in all directions. (ERG, 2024)

Personal Protective Equipment (PPE)

RECOMMENDED RESPIRATOR: When working with this chemical, wear a NIOSH-approved full face chemical cartridge respirator equipped with the appropriate organic vapor cartridges. If that is not available, a half face respirator similarly equipped plus airtight goggles can be substituted. However, please note that half face respirators provide a substantially lower level of protection than do full face respirators. (NTP, 1992)