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695076

Sigma-Aldrich

Formic acid

ACS reagent, ≥96%

Linear Formula:
HCOOH
CAS Number:
Molecular Weight:
46.03
Beilstein:
1209246
EC Number:
MDL number:
PubChem Substance ID:
NACRES:
NA.21

Quality Level

grade

ACS reagent

vapor density

1.6 (vs air)

vapor pressure

44.8 mmHg ( 20 °C)

assay

≥96%

form

liquid

autoignition temp.

1004 °F

expl. lim.

57 %

refractive index

n20/D 1.370 (lit.)

pH

2.2 (20 °C, 2.2  g/L)

bp

100-101 °C (lit.)

mp

8.2-8.4 °C (lit.)

solubility

water: miscible

density

1.22 g/mL at 25 °C (lit.)

anion traces

chloride (Cl-): ≤0.001%
sulfate (SO42-): ≤0.003%
sulfite (SO32-): passes test

cation traces

Fe: ≤0.001%
NH4+: ≤0.005%
heavy metals (as Pb): ≤0.001%

application(s)

sample preparation

SMILES string

OC=O

InChI

1S/CH2O2/c2-1-3/h1H,(H,2,3)

InChI key

BDAGIHXWWSANSR-UHFFFAOYSA-N

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General description

Formic acid is the simplest carboxylic acid. Crystal structure study by single-crystal X-ray diffraction technique at -50°C has shown that it has an orthorhombic structure with space group Pna. The photodegradation of formic acid has been investigated using ab intio calculations and time-resolved Fourier transform infrared spectroscopy. Its utility as a fuel in direct fuel cells has been studied. The momentum distribution for its monomer have been evaluated by electron momentum spectroscopy (EMS).

Packaging

100, 500 mL in poly bottle

Signal Word

Danger

Hazard Statements

Hazard Classifications

Acute Tox. 3 Inhalation - Acute Tox. 4 Oral - Eye Dam. 1 - Flam. Liq. 3 - Skin Corr. 1A

Supplementary Hazards

Storage Class Code

3 - Flammable liquids

WGK

WGK 1

Flash Point(F)

121.1 °F - closed cup

Flash Point(C)

49.5 °C - closed cup

Certificate of Analysis

Certificate of Origin

Direct formic acid fuel cells.
Rice C, et al.
Journal of Power Sources, 111(1), 83-89 (2002)
Electron momentum spectroscopy of formic acid.
Nixon KL, et al.
Chemical Physics Letters, 474(1), 23-27 (2009)
Sarela García-Santamarina et al.
Nature protocols, 9(5), 1131-1145 (2014-04-20)
Reversible thiol oxidation of cysteine residues occurs in many intracellular catalytic and signaling processes. Here we describe an optimized protocol, which can be completed in ∼5 d, to unambiguously identify specific cysteine residues that are transiently and reversibly oxidized by
Photodissociation of formic acid.
Su H, et al.
J. Chem. Phys., 113(5), 1891-1897 (2000)
The crystal structure of formic acid.
Holtzberg F, et al.
Acta Crystallographica, 6(2), 127-130 (1953)

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