8.00147

Acetylenedicarboxylic acid

for synthesis

• Synonym(s): Acetylenedicarboxylic acid, Butynedioic acid
• Empirical Formula (Hill Notation): C₄H₂O₄
• CAS Number: 142-45-0
• Molecular Weight: 114.06
• EC Index Number: 205-536-0
• UNSPSC Code: 12352106
• MDL number: MFCD00004362

Properties

• Quality Segment: 200
• assay: ≥97.0% (acidimetric)
• form: powder
• mp: 180-187 °C
• transition temp: flash point 131 °C
• bulk density: 550 kg/m³
• InChI: 1S/C4H2O4/c5-3(6)1-2-4(7)8/h(H,5,6)(H,7,8)
• InChI key: YTIVTFGABIZHHX-UHFFFAOYSA-N

Description

Analysis Note

Assay (acidimetric): ≥ 97.0 %
Identity (IR): passes test

Safety Information

• pictograms: GHS06
• signalword: Danger
• hcodes: H301,H315,H319,H335
• pcodes: P261 - P264 - P270 - P301 + P310 - P302 + P352 - P305 + P351 + P338
• Hazard Classifications: Acute Tox. 3 Oral - Eye Irrit. 2 - Skin Irrit. 2 - STOT SE 3
• target_organs: Respiratory system
• Storage Class: 6.1C - Combustible acute toxic Cat.3 / toxic compounds or compounds which causing chronic effects
• wgk: WGK 3
• flash_point_c: 131 °C
• flash_point_f: 267.8 °F