21039

Calcium carbide

granulated, technical, ≥75% (gas-volumetric)

• Synonym(s): Calcium acetylide, Calcium dicarbide
• Linear Formula: CaC₂
• CAS Number: 75-20-7
• Molecular Weight: 64.10
• Beilstein: 3909011
• EC Number: 200-848-3
• MDL number: MFCD00010905
• UNSPSC Code: 12352300
• PubChem Substance ID: 57647894
• NACRES: NA.23

Properties

• grade: technical
• Assay: ≥75% (gas-volumetric)
• form: pieces
• quality: granulated
• particle size: 0.1-1 mm
• density: 2.22 g/mL at 25 °C (lit.)
• SMILES string: [Ca++].[C-]#[C-]
• InChI: 1S/C2.Ca/c1-2;/q-2;+2
• InChI key: UIXRSLJINYRGFQ-UHFFFAOYSA-N

Description

General description

Calcium carbide (CaC2), also referred to as calcium acetylide, is an ionic compound. Technical grade CaC₂ is a grey solid with a granular form. The material is reactive with water and forms acetylene gas and calcium hydroxide. Our technical grade material consists of ≥75% CaC2 with the remainder of the composition being calcium oxide, phosphides, sulfides, and nitrides. CaC₂ is extensively utilized in the production of acetylene and calcium cyanamide. Additionally, it has been explored in producing phase change materials and as a shape-stabilized phase change material for the efficient utilization of solar energy. Furthermore, it is being investigated as an electrode material for rechargeable calcium batteries.

Application

• NUCLEOPHILIC ADDITION OF PHOSPHINOXIDES AND ALCOHOLS TO ACETYLENE GENERATED in situ FROM CALCIUM CARBIDE: This study discusses the reactivity of acetylene generated from calcium carbide for various organic synthesis applications (Aleksandrovna, 2024).
• Construction of 3-Methyl-2-Substituted Benzofurans and 3-Methyl-2-Substituted Benzothiophenes Using Solid Calcium Carbide as a Substitute for Gaseous …: Describes a synthetic method using solid calcium carbide in organic synthesis, highlighting its practicality and environmental benefits (Wang et al., 2024).

Safety Information

• Pictograms: GHS02,GHS05,GHS07
• Signal Word: Danger
• Hazard Statements: H260,H315,H318,H335
• Precautionary Statements: P223 - P231 + P232 - P261 - P280 - P302 + P352 - P305 + P351 + P338
• Hazard Classifications: Eye Dam. 1 - Skin Irrit. 2 - STOT SE 3 - Water-react 1
• Target Organs: Respiratory system
• Storage Class Code: 4.3 - Hazardous materials which set free flammable gases upon contact with water
• WGK: WGK 1
• Flash Point(F): Not applicable
• Flash Point(C): Not applicable
• Personal Protective Equipment: dust mask type N95 (US), Eyeshields, Gloves