grade

ACS reagent

Quality Level

200

vapor density

1.03 (vs air)

vapor pressure

52 mmHg ( 37 °C)
52 mmHg ( 37 °C)

form

liquid

autoignition temp.

572 °F

contains

10-15% Methanol as stabilizer (to prevent polymerization)

concentration

36.5-38.0%
37 wt. % in H₂O

impurities

≤0.006 meq/g Titr. acid

ign. residue

≤0.005%

color

APHA: ≤10

refractive index

n20/D 1.3765

density

1.09 g/mL at 25 °C (lit.)

anion traces

chloride (Cl^-): ≤5 ppm
sulfate (SO₄^2-): ≤0.002%

cation traces

Fe: ≤5 ppm
heavy metals: ≤5 ppm (by ICP-OES)

suitability

suitable for manufacturing use (Laboratory chemicals)

SMILES string

[H]C([H])=O

InChI

1S/CH2O/c1-2/h1H2

InChI key

WSFSSNUMVMOOMR-UHFFFAOYSA-N

Formaldehyde (formalin) is produced by oxidation of methanol. It is made of 37% formaldehyde and impurities such as methanol, small amounts of formic acid, aldehydes and ketones. It is used as a denaturant in formaldehyde-agarose gel electrophoresis of RNA.[1][2]

Formaldehyde solution has been used as a fixing agent to fix cells during immunofluorescence imaging and for cross-linking cells during chromatin immunoprecipitation (ChIP) assay.[3]

Formaldehyde solution has been used for cross-linking/fixing of cells in ChIP (chromatin immunoprecipitation) assay.[4][5] It has been used for fixing of cells for imaging.[6][7]

This product is a solution of approximately 37% by weight of formaldehyde gas in water.

The article number 252549-4X2.5L will be discontinued. Please order the single bottle 252549-2.5L which is physically identical with the same exact specifications.
The article number 252549-6X1L will be discontinued. Please order the single bottle 252549-1L which is physically identical with the same exact specifications.