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158127

Sigma-Aldrich

Paraformaldehyde

powder, 95%

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Synonym(s):
Polyoxymethylene
Linear Formula:
HO(CH2O)nH
CAS Number:
Molecular Weight:
30.03 (as monomer)
MDL number:
PubChem Substance ID:
NACRES:
NA.21

vapor density

1.03 (vs air)

Quality Level

vapor pressure

<1.45 mmHg ( 25 °C)

Assay

95%

form

powder

autoignition temp.

572 °F

expl. lim.

73 %

mp

120-170 °C (lit.)

density

0.88 g/mL at 25 °C (lit.)

storage temp.

2-8°C

InChI

1S/CH2O/c1-2/h1H2

InChI key

WSFSSNUMVMOOMR-UHFFFAOYSA-N

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1 of 4

This Item
P61484412448.18715
Paraformaldehyde powder, 95%

Sigma-Aldrich

158127

Paraformaldehyde

-
Paraformaldehyde reagent grade, crystalline

Sigma-Aldrich

P6148

Paraformaldehyde

Essential Grade
Paraformaldehyde prilled, 95%

Sigma-Aldrich

441244

Paraformaldehyde

-
Paraformaldehyde for synthesis

Sigma-Aldrich

8.18715

Paraformaldehyde

-
form

powder

form

crystalline

form

prilled

form

solid

mp

120-170 °C (lit.)

mp

120-170 °C (lit.)

mp

120-170 °C (lit.)

mp

100-130 °C

density

0.88 g/mL at 25 °C (lit.)

density

0.88 g/mL at 25 °C (lit.)

density

0.88 g/mL at 25 °C (lit.)

density

1.4 g/cm3 at 20 °C

storage temp.

2-8°C

storage temp.

2-8°C

storage temp.

-

storage temp.

-

Quality Level

200

Quality Level

200

Quality Level

200

Quality Level

200

General description

Paraformaldehyde is also referred as polyoxymethylene. It participates as an external CO source in the synthesis of aromatic aldehydes and esters.

Signal Word

Danger

Hazard Classifications

Acute Tox. 4 Inhalation - Acute Tox. 4 Oral - Carc. 1B - Eye Dam. 1 - Flam. Sol. 2 - Muta. 2 - Skin Irrit. 2 - Skin Sens. 1 - STOT SE 3

Target Organs

Respiratory system

Storage Class Code

4.1B - Flammable solid hazardous materials

WGK

WGK 2

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

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In Situ Hybridization in Neurobiology, 27-27 (1994)
Periodate-lysine-paraformaldehyde fixative. A new fixation for immunoelectron microscopy.
I W McLean et al.
The journal of histochemistry and cytochemistry : official journal of the Histochemistry Society, 22(12), 1077-1083 (1974-12-01)
L L Lanier et al.
Journal of immunological methods, 47(1), 25-30 (1981-01-01)
The objective of this study was to find a simple method to preserve cells for subsequent flow cytometry (FACS) analysis. We determined that fixation in 1% paraformaldehyde-0.85% saline solution did not significantly alter the Coulter volume, light scatter of fluorescence

Protocols

This protocol describes a method for chemical cross-linking of proteins using formaldehyde. With the exception of zero-length cross-linkers, formaldehyde has the shortest cross-linking span (~2-3 Å) of any cross-linking reagent, thus making it an ideal tool for detecting specific protein-protein interactions with great confidence.

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