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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HCID 62325Generated: October 23, 2026

Isobutyryl chloride

isobutyryl · 2-METHYLPROPANOYL CHLORIDE · IBCL · ISOBUTANOYLCHLORIDE · Isoburyryl chloride · 2-METHYLPROPIONYL CHLORIDE · ISOBUTRYL CHLORIDE · ISOBUTYRYL CHLORIDE

https://huagongshe.com/en/chemical/62325

Isobutyryl chloride molecular structure

Identifiers & Physical Properties

CAS No.79-30-1
Molecular formulaC4H7ClO
Average molar mass106.55 g/mol
Monoisotopic mass106.01854252 g/mol
SMILESCC(C)C(=O)Cl
InChIKeyDGMOBVGABMBZSB-UHFFFAOYSA-N
PubChem CID62325
EC No.201-194-1
DTXSIDDTXSID0052542

Chemical & Physical Properties

XLogP1.8
Topological polar surface area17.1
Hydrogen bond donors0
Hydrogen bond acceptors1
Rotatable bonds1
Heavy atoms6
Formal charge0
Complexity58.6
Chemical classesToxic Gases & Vapors -> Acid HalidesFlammable agents - 3rd degree
SpringerMaterials PropertiesSchoenflies notation
Physical DescriptionIsobutyryl chloride appears as a colorless liquid. Irritates skin, eyes and mucous membranes. Toxic by ingestion, inhalation and skin absorption. Used to make other chemicals.[Alfa Aesar MSDS]
Melting point-90 °C (lit.)
Boiling point91-93 °C (lit.)
Density1.017 g/mL at 25 °C (lit.)
Vapor pressure0.07 mm Hg ( 20 °C)
Refractive indexn20/D 1.407(lit.)
Flash point34 °F
Storage conditionsStore below +30°C.
SolubilityMiscible with chloroform, glacial acetic acid, ether, toluene, methylene chloride and benzene.Reacts
Physical stateLiquid
ColorClear
OdorStench
pH<7 (H2O)
Explosive limits2.1-8.2%(V)
SensitivityMoisture Sensitive
BRN605393
InChI1S/C4H7ClO/c1-3(2)4(5)6/h3H,1-2H3
InChIKeyDGMOBVGABMBZSB-UHFFFAOYSA-N
SMILESCC(C)C(Cl)=O
CAS DataBase Reference79-30-1(CAS DataBase Reference)
EWG's Food Scores1
FDA UNII6617F0VJZC
NIST Chemistry Reference2-Methylpropanoyl chloride(79-30-1)
EPA Substance Registry SystemPropanoyl chloride, 2-methyl- (79-30-1)
UNSPSC Code12352100
NACRESNA.22
GHS pictogramGHS02,GHS05,GHS06
Signal wordDanger
GHS hazard statementsH330-H302-H314-H225-H290
GHS precautionary statementsP501-P270-P240-P260-P210-P233-P234-P243-P241-P242-P271-P264-P280-P284-P370+P378-P390-P303+P361+P353-P301+P330+P331-P363-P301+P312+P330-P304+P340+P310-P305+P351+P338+P310-P403+P233-P403+P235-P406-P405
Personal protective equipment (PPE)Faceshields, Gloves, Goggles, type ABEK (EN14387) respirator filter
Hazard symbolsF,C,T
Risk statements (R)11-35-23
Safety statements (S)16-23-26-36-45-36/37/39-28A
UN transport numberUN 2395
Water hazard class (WGK)1
RTECS numberUC3944000
F13
Autoignition temperature325 °C
Hazard NoteHighly Flammable/Corrosive/Moisture Sensitive
TSCA inventory statusTSCA listed
Hazard class3Flam. Liq. 2Skin Corr. 1A
Packing groupII
Customs code29147090
Storage class3 - Flammable liquids
REACH registrationsActive
Limited quantities1.0 L (0.3 gallon) (liquid)
Excepted quantitiesMax Inner Pack (30g or 30ml) and Max Outer Pack (500g or 500ml)

Safety & Regulations

GHS classificationDangerH225: Highly Flammable liquid and vapor [Danger Flammable liquids]P210, P233, P240, P241, P242, P243, P260, P264, P280, P301+P330+P331, P302+P361+P354, P303+P361+P353, P304+P340, P305+P354+P338, P316, P321, P363, P370+P378, P403+P235, P405, and P501 (click each P-code to see the statement)H225 (100%): Highly Flammable liquid and vapor [Danger Flammable liquids]P210, P233, P234, P240, P241, P242, P243, P260, P264, P264+P265, P270, P271, P280, P284, P301+P317, P301+P330+P331, P302+P361+P354, P303+P361+P353, P304+P340, P305+P354+P338, P316, P317, P320, P321, P330, P363, P370+P378, P390, P403+P233, P403+P235, P405, P406, and P501 (click each P-code to see the statement)
Hazards IdentificationWater-reactive material (WR)
Regulatory informationStatus: Active Update: 20-12-2022 https://echa.europa.eu/registration-dossier/-/registered-dossier/13467Isobutyryl chloride: Does not have an individual approval but may be used under an appropriate group standardThe New Jersey Worker and Community Right to Know Act requires public and private employers to provide information about hazardous substances at their workplaces. (N.J.S.A. 34:5A-1 et. seq.)
DOT labelFlammable Liquid Corrosive
Fire hazardsExcerpt from ERG Guide 155 [Substances - Toxic and/or Corrosive (Flammable / Water-Sensitive)]:· HIGHLY FLAMMABLE: Will be easily ignited by heat, sparks or flames.
Health hazardsExcerpt from ERG Guide 155 [Substances - Toxic and/or Corrosive (Flammable / Water-Sensitive)]:· TOXIC and/or CORROSIVEinhalation, ingestion or contact (skin, eyes) with vapors, dusts or substance may cause severe injury, burns or death.
Hazards summaryA severe eye irritantCauses focal lung fibrosis and acute pulmonary edema in inhalation lethal-concentration studies of rats[RTECS] Causes burnsInhalation may cause corrosive injuries to upper respiratory tract and lungs[Alfa Aesar MSDS]
DOT ID and guide2395 155
Reactive groupAcyl Halides, Sulfonyl Halides, and Chloroformates
Reactivity AlertsHighly Flammable
Reactivity ProfileISOBUTYRYL CHLORIDE is water reactive. Incompatible with strong oxidizing agents, alcohols, bases (including amines). May react vigorously or explosively if mixed with diisopropyl ether or other ethers in the presence of trace amounts of metal salts [J. Haz. Mat., 1981, 4, 291].
DOT Hazard ClassificationIsobutyryl chlorideUN2395Class 3 Flammable and combustible liquid (49 eCFR § 173.120)PG II: the degree of danger presented by the material is medium
Air and Water ReactionsHighly flammable. Produces corrosive toxic fumes containing HCl on contact with moist air. Decomposes in water.
Fire fightingExcerpt from ERG Guide 155 [Substances - Toxic and/or Corrosive (Flammable / Water-Sensitive)]:
Accidental release measures· CALL 911. Then call emergency response telephone number on shipping paper. If shipping paper not available or no answer, refer to appropriate telephone number listed on the inside back cover.· ELIMINATE all ignition sources (no smoking, flares, sparks or flames) from immediate area.
First aidExcerpt from ERG Guide 155 [Substances - Toxic and/or Corrosive (Flammable / Water-Sensitive)]:General First Aid:
Exposure control and personal protection· Wear positive pressure self-contained breathing apparatus (SCBA).TIH (Toxic Inhalation Hazard) - Term used to describe gases and volatile liquids that are toxic when inhaled. Some are TIH materials themselves, e.g., chlorine, and some release TIH gases when spilled in water, e.g., chlorosilanes. [ERG 2016].
Nonfire spill responseExcerpt from ERG Guide 155 [Substances - Toxic and/or Corrosive (Flammable / Water-Sensitive)]:
Isolation and EvacuationExcerpt from ERG Guide 155 [Substances - Toxic and/or Corrosive (Flammable / Water-Sensitive)]:Immediate precautionary measureWhen spilled in water
Toxic-by-Inhalation (TIH) GasHCl - when spill Isobutyryl chloride into water.
Personal Protective Equipment (PPE)Excerpt from ERG Guide 155 [Substances - Toxic and/or Corrosive (Flammable / Water-Sensitive)]:
Emergency Response Planning Guidelines· Note: Most foams will react with the material and release corrosive/toxic gases.
Adverse effectsDermatotoxin - Skin burns.
Toxicity DataLCLo (rat) = 11,600 mg/m3/4hr
F13
Personal protective equipment (PPE)Faceshields, Gloves, Goggles, type ABEK (EN14387) respirator filter
Water hazard class (WGK)1
TSCA inventory statusTSCA listed
RTECS numberUC3944000
UN transport numberUN 2395
Customs code29159080
Risk statements (R)11-35-23
Signal wordDanger
GHS pictogramGHS02,GHS05,GHS06
Hazard symbolsF,C,T
hazard_noteHighly Flammable/Corrosive/Moisture Sensitive
Safety statements (S)16-23-26-36-45-36/37/39-28A
Hazard class3Flam. Liq. 2Skin Corr. 1A
Storage class3 - Flammable liquids
Packing groupII
GHS hazard statementsH330-H302-H314-H225-H290
Limited quantities1.0 L (0.3 gallon) (liquid)
Excepted quantitiesMax Inner Pack (30g or 30ml) and Max Outer Pack (500g or 500ml)
REACH registrationsActive
Autoignition temperature325 °C
GHS precautionary statementsP501-P270-P240-P260-P210-P233-P234-P243-P241-P242-P271-P264-P280-P284-P370+P378-P390-P303+P361+P353-P301+P330+P331-P363-P301+P312+P330-P304+P340+P310-P305+P351+P338+P310-P403+P233-P403+P235-P406-P405

Applications & Uses

Uses

Usually used in the synthesis of fully isobutyramide terminated hyperbranched polyethylenimines,the separation and identification of shikonin and its ester derivatives in the root epidermis of Echium italicum.

Uses

Isobutyryl chloride is used in the preparation of fully isobutyramide terminated hyperbranched polyethylenimines. It plays an important role in the separation and identification of shikonin and its ester derivatives in the root epidermis of Echium italicum L. It acts as an acylating agent for the ketimine derivatives of alfa-amino esters, nucleosides and pyrroles. Further, it is used in the preparation of organic peroxides. In addition to this, it is used as an intermediate for dyes, textile auxiliaries and peroxide compounds.

General Description

A colorless liquid. Flash point near 50°F. Irritates skin, eyes and mucous membranes. Toxic by ingestion, inhalation and skin absorption. Used to make other chemicals.