Paraformaldehyde , AR , 30525-89-4

Synonym(s):
Paraformaldehyde;Polyoxymethylene

CAS NO.：30525-89-4

Empirical Formula: （CH2O)n

Molecular Weight: 90.08

MDL number: MFCD00133991

EINECS: 608-494-5

Update time: 2022-07-08

PRODUCT Properties

Melting point:	120-170 °C (lit.)
Boiling point:	107.25°C (rough estimate)
Density	0.88 g/mL at 25 °C (lit.)
vapor density	1.03 (vs air)
vapor pressure	<1.45 mm Hg ( 25 °C)
refractive index	1.4540 (estimate)
Flash point:	158 °F
storage temp.	2-8°C
solubility	chlorophenol above 70°C: soluble
form	prilled
color	White to off-white
PH	5.5 (H2O, 20℃)(saturated solution)
Odor	odor of formaldehyde
PH Range	4 - 5.5
explosive limit	7-73%(V)
Water Solubility	sparingly soluble
Merck	14,7025
BRN	102769
Dielectric constant	4.0（Ambient）
Stability:	Stable. Incompatible with strong acids, organic acids, strong oxidizing agents, oxides, alkalies, strong bases, amines. Combustible. Dust may form an explosive mixture with air. Liberates poisonous gases on combustion.
InChIKey	VHWYCFISAQVCCP-UHFFFAOYSA-N

Description and Uses

Paraformaldehyde is used as a fumigant, a disinfectant and in the manufacture of synthetic resins like melamine resin, phenol resin and polyacetal resin. It is also used in cell culture. It also serves as a fixative in electron microscopy. It is also used in the preparation of formalin fixatives for tissues or cells. To use the chemical as a fixative, it must be converted to the monomer formaldehyde by heating as formaldehyde is the active chemical in fixation.

Safety

Symbol(GHS)	GHS02,GHS05,GHS07,GHS08
Signal word	Danger
Hazard statements	H228-H302+H332-H315-H317-H318-H335-H341-H350
Precautionary statements	P210-P280-P301+P312-P304+P340+P312-P305+P351+P338-P308+P313
Hazard Codes	Xn,F
Risk Statements	31-43-40-36/37/38-20/22-41-37/38-42/43-20/21/22-11
Safety Statements	36-45-36/37/39-26-24-22
RIDADR	UN 2213 4.1/PG 3
WGK Germany	3
RTECS	RV0540000
Autoignition Temperature	572 °F
TSCA	Yes
HazardClass	4.1
PackingGroup	III
HS Code	38084090
Toxicity	LD50 orally in Rabbit: 592 mg/kg