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Oxalic acid Structure

Oxalic acid

Chemical Properties

Melting point 189.5 °C (dec.)(lit.)
Boiling point 365.1°C (estimate)
Density  0.99 g/mL at 25 °C
vapor density  4.4 (vs air)
vapor pressure  <0.01 mm Hg ( 20 °C)
refractive index  1.4261 (estimate)
Flash point 101-157°C
storage temp.  Store below +30°C.
solubility  water: soluble108g/L at 25°C
form  Liquid
pka 1.23(at 25℃)
color  White
PH Range 6 - 8 at 25 °C
PH 3(1 mM solution);2.09(10 mM solution);1.31(100 mM solution);
Odor odorless
Water Solubility  90 g/L (20 ºC)
Sublimation  101-157 ºC
Merck  14,6911
BRN  385686
Henry's Law Constant 1.43 at pH 4 (quoted, Gaffney et al., 1987)
Exposure limits NIOSH REL: TWA 1, STEL 2, IDLH 500; OSHA PEL: TWA 1; ACGIH TLV: TWA 1, STEL 2 (adopted).
Stability Stable, but moisture sensitive. Incompatible with metals.
InChIKey MUBZPKHOEPUJKR-UHFFFAOYSA-N
LogP -1.7 at 23℃
Indirect Additives used in Food Contact Substances OXALIC ACID
FDA 21 CFR 177.2410
CAS DataBase Reference 144-62-7(CAS DataBase Reference)
EWG's Food Scores 2-4
FDA UNII 9E7R5L6H31
NIST Chemistry Reference Oxalic acid(144-62-7)
EPA Substance Registry System Oxalic acid (144-62-7)

Safety

Symbol(GHS)
Signal wordDanger
Hazard statements H302+H312-H318
Precautionary statements P264-P270-P280-P301+P312-P302+P352+P312-P305+P351+P338
Hazard Codes  Xn
Risk Statements  21/22-63-34-41
Safety Statements  24/25-23-36/37/39-27-26-39-37-36-36/37
RIDADR  UN 3261 8/PG 3
WGK Germany  1
RTECS  RO2450000
TSCA  Yes
HazardClass  8
PackingGroup  III
HS Code  29171110
Hazardous Substances Data 144-62-7(Hazardous Substances Data)
Toxicity LD50 orally in Rabbit: 375 mg/kg
IDLA 500 mg/m3
NFPA 704:
1
3 0

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