5972-73-6

Basic information

• Product Name: AMMONIUM OXALATE MONOHYDRATE
• Synonyms: AMMONIUM OXALATE-1-HYDRATE;AMMONIUM OXALATE ACID;AMMONIUM OXALATE H2O;AMMONIUM ACID OXALATE;AMMONIUM ETHANEDIOATE MONOHYDRATE;AMMONIUM BINOXALATE;ETHANEDIOIC ACID DIAMMONIUM SALT, MONOHYDRATE;DI-AMMONIUM OXALATE MONOHYDRATE
• CAS NO: 5972-73-6
• Molecular Formula: C₂HO₄*H₂O*H₄N
• Molecular Weight: 142.11
• EINECS: 238-135-4
• Product Categories: Industrial/Fine Chemicals
• Mol File: 5972-73-6.mol
• Article Data: 1

Chemical Properties

• Melting Point: 133 °C (dec.)(lit.)
• Boiling Point: 511°C at 760 mmHg
• Flash Point: 262.8°C
• Appearance: /
• Vapor Pressure: 4.48E-12mmHg at 25°C
• Solubility: H2O: 0.1 M at 20 °C, clear, colorless
• CAS DataBase Reference: AMMONIUM OXALATE MONOHYDRATE(CAS DataBase Reference)
• NIST Chemistry Reference: AMMONIUM OXALATE MONOHYDRATE(5972-73-6)
• EPA Substance Registry System: AMMONIUM OXALATE MONOHYDRATE(5972-73-6)

Safety Data

• Hazard Codes: Xn
• Statements: 21/22
• Safety Statements: 24/25
• RIDADR: UN 1759 8/PG 3
• WGK Germany: 1
• F: 21
• Hazardous Substances Data: 5972-73-6(Hazardous Substances Data)

Usage

InChI:InChI=1/C2H2O4.H3N.H2O/c3-1(4)2(5)6;;/h(H,3,4)(H,5,6);1H3;1H2/p-1

Downstream Products

• 74-90-8 hydrogen cyanide 
• 124-38-9 carbon dioxide 
• 7664-41-7 ammonia 
• 64-18-6 formic acid 
• 471-47-6 oxamic acid 

Relevant articles and documents

Calorimetric study of phase transitions in ammonium hydrogen oxalate hemihydrate and its deuterated compound

The molar heat capacities of ammonium hydrogen oxalate hemihydrate and its fully-deuterated compound were measured from 13 to 300 K. A higher-order phase transition was found in each compound. The temperatures and molar entropies of transition are 145.4K (6.01 J K-1 mol-1) and 160.1 K (8.23 J K-1 mol-1) in the protonated and deuterated compounds, respectively, where the mole refers to (NH4HC2O4)2·H2O or (ND4DC2O4)2·D2O. The entropies of the transitions indicate that they are order-disorder transitions, probably related to the ordering of one of the ammonium ions. The pressure coefficient of the transition temperature was calculated by the Ehrenfest relation and the available data of the thermal expansivity of the hydrogenous compound: -2.0 × 107 Pa K-1 in good agreement with a reported value -1.9 × 107 Pa K-1 based on a high pressure experiment.