Oxalonitrile

C2N2

oxalonitrile

CAS460-19-5
GHS02 Gefahrensymbol: Entzündbar – Flamme
GHS04 Gefahrensymbol: Unter Druck stehende Gase – Gasflasche
GHS06 Gefahrensymbol: Giftig – Totenkopf mit Knochen
GHS09 Gefahrensymbol: Umweltgefährlich – Umwelt
Danger

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Identification

CAS Number
460-19-5
EC Number
207-306-5
UN Number
1026
Index Number
608-011-00-8
PubChem CID
9999

Physical-chemical properties

Molecular Formula
C2N2
Molar Mass
52.03 g/mol
IUPAC Name
oxalonitrile

Chemical Identifiers

InChI
InChI=1S/C2N2/c3-1-2-4
InChI Key
JMANVNJQNLATNU-UHFFFAOYSA-N

Overview

Oxalonitrile (CAS 460-19-5) is a highly toxic gaseous compound with extreme flammability and significant environmental hazards. This linear molecule, also known by its IUPAC name oxalonitrile, represents one of the simplest dicyanides with the molecular formula C2N2 and a molecular weight of 52.03 g/mol. As a colorless gas under standard conditions, oxalonitrile exhibits exceptional reactivity due to its two nitrile functional groups, making it both industrially valuable and extremely hazardous to handle. The compound belongs to a family of small toxic gases that includes other dangerous substances such as arsane and requires specialized handling protocols similar to those used for methanethiol and other highly toxic industrial gases. The safety profile of oxalonitrile demands immediate attention, classified under multiple GHS hazard categories including flammable gas category 1, pressurized gas, and acute toxicity category 3. Its environmental impact is equally concerning, with classifications as both acute and chronic aquatic hazard category 1, indicating severe potential for ecological damage. The compound requires ADR class 2 transportation protocols and displays multiple warning pictograms including flame, gas cylinder, skull and crossbones, and environmental hazard symbols. Industrial applications of oxalonitrile primarily focus on specialized chemical synthesis processes, particularly in pharmaceutical intermediate production and advanced materials manufacturing. The compound serves as a valuable building block in organic synthesis reactions where its dual nitrile functionality enables the formation of complex molecular structures. Additionally, it finds use in certain polymerization processes for specialty polymers. OYSI maintains technical-grade oxalonitrile availability for qualified industrial customers with appropriate handling capabilities and safety infrastructure.

Safety & Classification

Danger
Classification:

Flam. Gas 1; Press. Gas; Acute Tox. 3 *; Aquatic Acute 1; Aquatic Chronic 1

HHazard Statements (H-Statements)

Describe the nature and severity of the hazard

H220

Extremely flammable gas.

H331

Toxic if inhaled.

H400

Very toxic to aquatic life.

H410

Very toxic to aquatic life with long lasting effects.

Classification according to CLP Regulation (EC) No 1272/2008. The complete list of hazard and precautionary statements can be found in the Safety Data Sheet (SDS).

First Aid Measures

Inhalation

Toxic

Measures if vapours or dust are inhaled

First Aid Actions

  • +P304IF INHALED:
  • +P340Remove person to fresh air and keep comfortable for breathing.
  • +P311Call a POISON CENTER/doctor.

Related hazard statements:

General Measures

Emergency 112 | Poison Control: +49 30 19240 (DE), +33 1 45 42 59 59 (FR), +31 30 274 88 88 (NL)

First aid measures are based on CLP classification and associated P-statements. They do not replace the Safety Data Sheet (SDS). In case of emergency, always consult the full SDS and a physician.

Transport (ADR)

UN Number1026
ADR Class2
Packing Group
Tunnel CodeB/D
Proper Shipping NameDicyan, unter Druck verflüssigt
Marine PollutantNo

Frequently Asked Questions

What is oxalonitrile?

Oxalonitrile is a chemical compound with the molecular formula C2N2 and CAS number 460-19-5. It has a molecular weight of 52.03 g/mol and belongs to the nitrile family of organic compounds. This substance is classified as a flammable and pressurized gas with acute toxicity properties. It also presents aquatic toxicity hazards, making it a highly regulated chemical requiring specialized handling and storage conditions in industrial applications.

What are the physicochemical properties of oxalonitrile?

Oxalonitrile is a gas under normal conditions, as indicated by its classification as a pressurized gas (Press. Gas). The compound consists of two carbon atoms and two nitrogen atoms, forming a relatively simple molecular structure. Its low molecular weight of 52.03 g/mol contributes to its gaseous state at ambient temperature and pressure. Specific physical properties like exact boiling point, density, and solubility require consultation of detailed technical datasheets.

What is oxalonitrile used for?

Oxalonitrile serves as an intermediate in organic synthesis and chemical manufacturing processes. Its nitrile functional groups make it valuable for producing various chemical derivatives and specialized compounds. The substance is typically used in controlled industrial environments where its reactive properties can be utilized safely. Applications may include synthesis of pharmaceuticals, agrochemicals, or other fine chemicals, though specific uses depend on the particular manufacturing requirements and safety protocols of each facility.

How to handle oxalonitrile safely?

Oxalonitrile requires specialized personal protective equipment including gas-tight chemical suits, self-contained breathing apparatus, and chemical-resistant gloves due to its acute toxicity (Acute Tox. 3). Work must be conducted in well-ventilated areas or under controlled atmosphere conditions. Avoid all ignition sources as it is classified as Flam. Gas 1. Only trained personnel should handle this substance, following strict safety protocols and emergency procedures. Continuous gas monitoring equipment is essential during handling operations.

How to store oxalonitrile correctly?

Oxalonitrile must be stored in specialized pressure vessels designed for flammable gases, away from heat sources, sparks, and incompatible materials. Storage areas require adequate ventilation, gas leak detection systems, and fire suppression equipment. The storage facility must comply with regulations for flammable and toxic gases. Keep containers upright, properly labeled, and in temperature-controlled environments. Segregate from oxidizing agents, acids, and other incompatible substances to prevent dangerous reactions.

What to do in case of contact with oxalonitrile?

Oxalonitrile exposure requires immediate emergency response due to its acute toxicity. In case of inhalation, move the person to fresh air immediately and seek medical attention. For skin contact, remove contaminated clothing and flush with water. Eye contact requires immediate irrigation with clean water for at least 15 minutes. Call emergency services and poison control centers immediately. Provide medical personnel with the safety data sheet. Never attempt rescue without proper protective equipment in case of gas release.

How to dispose of oxalonitrile appropriately?

Oxalonitrile disposal must comply with hazardous waste regulations due to its flammability, toxicity, and environmental hazards. Contact licensed hazardous waste disposal companies specialized in toxic gases and flammable materials. Never release into the environment as it poses aquatic toxicity risks (Aquatic Acute 1, Aquatic Chronic 1). Disposal methods may include controlled incineration at high temperatures or chemical neutralization by qualified facilities. Maintain proper documentation and waste tracking throughout the disposal process.

How to transport oxalonitrile?

Oxalonitrile is classified under ADR Class 2 for transport, indicating it must be shipped as a gas with specific packaging and labeling requirements. Transport requires specialized containers designed for pressurized gases, proper hazard placarding, and documentation including transport emergency cards. Only certified carriers experienced with dangerous goods can transport this substance. Vehicles must meet ADR requirements for gas transport, including appropriate safety equipment and driver certification for hazardous materials transport.

Is oxalonitrile subject to particular regulations?

Oxalonitrile is subject to multiple regulatory frameworks including REACH registration requirements, CLP classification and labeling regulations, and transport regulations under ADR. Its classification as Acute Tox. 3 and environmental hazard categories trigger specific handling, storage, and reporting obligations. While not currently listed as an SVHC substance, it requires safety data sheets, exposure assessments, and compliance with occupational exposure limits. Users must implement risk management measures and worker protection programs according to EU chemical safety regulations.

Where to buy oxalonitrile in Europe?

Oxalonitrile is available through OYSI, a European distributor specializing in technical chemicals and hazardous substances. As a specialized chemical requiring expert handling, it is typically supplied to qualified industrial users with appropriate safety infrastructure. OYSI provides technical support, proper documentation, and compliance assistance for European customers. Due to its hazardous nature, procurement requires verification of proper storage facilities, trained personnel, and regulatory compliance before supply can be arranged.

Data Sources

Classification per CLP Regulation (EC) No 1272/2008. Data from ECHA and PubChem.