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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:
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

Signal Word

Danger

Hazard Statements

H351,H360D,H373

Hazard Classifications

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

Target Organs

Blood

Storage Class Code

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

WGK

WGK 1

Flash Point(F)

305.6 °F

Flash Point(C)

152 °C

Certificates of Analysis (COA)

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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
Microwave spectrum and molecular structure of formamide.
Costain CC and Dowling JM.
J. Chem. Phys. , 32(1), 158-165 (1960)
The formamide method for the extraction of polysaccharides from haemolytic streptococci.
Fuller AT.
British Journal of Experimental Pathology, 32(1), 130-130 (1960)
Solubilization in formamide protects RNA from degradation.
Chomczynski P.
Nucleic Acids Research, 20(14), 3791-3791 (1992)
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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