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47670

Sigma-Aldrich

Formamide

puriss. p.a., ACS reagent, ≥99.5% (GC/T)

Synonym(s):

Amide C1, Formic amide

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About This Item

Linear Formula:
HCONH2
CAS Number:
75-12-7
Molecular Weight:
45.04
Beilstein/REAXYS Number:
505995
EC Number:
200-842-0
MDL number:
MFCD00007941
UNSPSC Code:
12352111
PubChem Substance ID:
329757333

grade

ACS reagent
puriss. p.a.

vapor density

1.55 (vs air)

vapor pressure

0.08 mmHg ( 20 °C)
30 mmHg ( 129 °C)

assay

≥99.5% (GC/T)

form

liquid

autoignition temp.

932 °F

expl. lim.

2.7-19 %

technique(s)

PCR: suitable

impurities

≤0.02% free acid (as HCOOH)
≤0.1% water

refractive index

n20/D 1.447 (lit.)
n20/D 1.447

pH

4-10 (20 °C, 200 g/L)

bp

210 °C (lit.)

mp

2-3 °C (lit.)

transition temp

transition temp 2.0-3.0 °C

density

1.132 g/mL at 20 °C
1.134 g/mL at 25 °C (lit.)

cation traces

Ca: ≤5 mg/kg
Cd: ≤1 mg/kg
Co: ≤1 mg/kg
Cr: ≤1 mg/kg
Cu: ≤1 mg/kg
Fe: ≤1 mg/kg
K: ≤20 mg/kg
Mg: ≤1 mg/kg
Mn: ≤1 mg/kg
Na: ≤20 mg/kg
Ni: ≤1 mg/kg
Pb: ≤1 mg/kg
Zn: ≤1 mg/kg

suitability

in accordance for miscibility

SMILES string

NC=O

InChI

1S/CH3NO/c2-1-3/h1H,(H2,2,3)

InChI key

ZHNUHDYFZUAESO-UHFFFAOYSA-N

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General description

Formamide is a colorless organic solvent. It has been reported to increase the precision of PCR (Polymerase Chain Reaction) studies. Microwave spectral study of its isotopic forms suggests that the molecule of formamide is nonplanar in which the H2N-C group exhibits a shallow pyramid like structure.

Application

Formamide destabilizes nucleic acid duplexes and may be used, typically, at a concentration of 50%, in hybridization protocols requiring lower hybridization temperatures.

pictograms

Health hazard
GHS08

signalword

Danger

Hazard Classifications

Carc. 2 - Repr. 1B - STOT RE 2 Oral

target_organs

Blood

Storage Class

6.1C - Combustible acute toxic Cat.3 / toxic compounds or compounds which causing chronic effects

wgk_germany

WGK 1

flash_point_f

305.6 °F

flash_point_c

152 °C

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

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Microwave spectrum and molecular structure of formamide.
Costain CC and Dowling JM.
J. Chem. Phys. , 32(1), 158-165 (1960)
J Casey et al.
Nucleic acids research, 4(5), 1539-1552 (1977-01-01)
The thermal stabilities of RNA:DNA hybrids are substantially greater than those of DNA:DNA duplexes in aqueous electrolyte solutions containing high concentrations of formamide. Association rates to form DNA:DNA duplexes and DNA:RNA hybrids have been measured in these solvents. There is
Solubilization in formamide protects RNA from degradation.
Chomczynski P.
Nucleic Acids Research, 20(14), 3791-3791 (1992)
The formamide method for the extraction of polysaccharides from haemolytic streptococci.
Fuller AT.
British Journal of Experimental Pathology, 32(1), 130-130 (1960)
Formamide can dramatically improve the specificity of PCR.
G Sarkar et al.
Nucleic acids research, 18(24), 7465-7465 (1990-12-25)
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