144-62-7
Product Name:
Oxalic acid
Formula:
C2H2O4
Synonyms:
Ethanedioic acid dihydrate;Oxalic acid;Oxalic acid solution
Inquiry
CHEMICAL AND PHYSICAL PROPERTIES
| Physical Description | Oxalic acid is an odorless white solid. Sinks and mixes with water. (USCG, 1999) |
|---|---|
| Color/Form | ANHYDROUS OXALIC ACID, CRYSTALLIZED FROM GLACIAL ACETIC ACID IS ORTHORHOMBIC, CRYSTALS BEING PYRAMIDAL OR ELONGATED OCTAHEDRA |
| Odor | Odorless. |
| Boiling Point | Sublimes (NIOSH, 2023) |
| Melting Point | 372 °F (Decomposes) (NTP, 1992) |
| Solubility | 50 to 100 mg/mL at 75 °F (NTP, 1992) |
| Density | 1.9 at 59 °F (USCG, 1999) - Denser than water; will sink |
| Vapor Density | 4.3 (NTP, 1992) - Heavier than air; will sink (Relative to Air) |
| Vapor Pressure | 0.001 mmHg at 68 °F (NTP, 1992) |
| LogP | -0.81 |
| LogS | 0.38 |
| Henry's Law Constant | Henry's Law constant: 1.4X10-10 atm-cu m/mole at 25 °C (experimental) |
| Stability/Shelf Life | OXALIC ACID CAN BE DEHYDRATED BY CAREFUL DRYING @ 100 °C, BUT LOSSES OCCUR THROUGH SUBLIMATION /OXALIC ACID DIHYDRATE/ |
| Autoignition Temperature | Not flammable (USCG, 1999) |
| Decomposition | ... DECOMP PRODUCTS INCL CARBON MONOXIDE & FORMIC ACID. |
| Heat of Combustion | -245.61 KJ/mol |
| Dissociation Constants | pKa 1: 1.46; pKa 2: 4.40 |
| Kovats Retention Index | 748 |
| Other Experimental Properties | MP: 101-102 °C GIVING OFF WATER OF CRYSTALLIZATION & STARTING TO SUBLIME; K1= 5.36X10-2; K2= 5.3X10-5; DENSITY: 1.653 @ 18.5 °C/4 °C; DENSITY OF 1% (WT/WT) AQ SOLN: 1.0035 @ 17.5 °C/4 °C; DENSITY OF 3% (WT/WT) AQ SOLN: 1.0105 @ 17.5 °C/4 °C; DENSITY OF 5% (WT/WT) AQ SOLN: 1.0175 @ 17.5 °C/4 °C; DENSITY OF 10% (WT/WT) AQ SOLN: 1.0350 @ 17.5 °C/4 °C; DENSITY OF 13% (WT/WT) AQ SOLN: 1.0455 @ 17.5 °C/4 °C /OXALIC ACID DIHYDRATE/ |
SAFETY INFORMATION
| Signal word | Danger |
|---|---|
| Pictogram(s) |
 Corrosion Corrosives GHS05  Exclamation Mark Irritant GHS07 |
| GHS Hazard Statements |
H318:Serious eye damage/eye irritation |
| Precautionary Statement Codes |
P264:Wash hands thoroughly after handling. P264:Wash skin thouroughly after handling. P270:Do not eat, drink or smoke when using this product. P280:Wear protective gloves/protective clothing/eye protection/face protection. P301+P312:IF SWALLOWED: call a POISON CENTER or doctor/physician IF you feel unwell. P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing. |
COMPUTED DESCRIPTORS
| Molecular Weight | 90.03 g/mol |
|---|---|
| XLogP3 | -0.3 |
| Hydrogen Bond Donor Count | 2 |
| Hydrogen Bond Acceptor Count | 4 |
| Rotatable Bond Count | 1 |
| Exact Mass | 89.99530854 g/mol |
| Monoisotopic Mass | 89.99530854 g/mol |
| Topological Polar Surface Area | 74.6 Ų |
| Heavy Atom Count | 6 |
| Formal Charge | 0 |
| Complexity | 71.5 |
| Isotope Atom Count | 0 |
| Defined Atom Stereocenter Count | 0 |
| Undefined Atom Stereocenter Count | 0 |
| Defined Bond Stereocenter Count | 0 |
| Undefined Bond Stereocenter Count | 0 |
| Covalently-Bonded Unit Count | 1 |
| Compound Is Canonicalized | Yes |
PRODUCT INTRODUCTION
description
Oxalic acid is an odorless white solid. Sinks and mixes with water. (USCG, 1999)