16005

Paraformaldehyde

meets analytical specification of DAC, 95.0-100.5%

• Synonym(s): Polyoxymethylene
• Linear Formula: HO(CH₂O)_nH
• CAS Number: 30525-89-4
• Molecular Weight: 30.03 (as monomer)
• MDL number: MFCD00133991
• UNSPSC Code: 12352100
• PubChem Substance ID: 24849849
• NACRES: NA.22

Properties

• vapor density: 1.03 (vs air)
• vapor pressure: <1.45 mmHg ( 25 °C)
• Assay: 95.0-100.5%
• form: pellets
• autoignition temp.: 572 °F
• quality: meets analytical specification of DAC
• expl. lim.: 73 %
• technique(s): NMR: suitable
• impurities: residual solvents, in accordance; <0.1% sulfated ash; 10 ppm heavy metals (as Pb)
• mp: 120-170 °C (lit.)
• solubility: water: insoluble
• density: 0.88 g/mL at 25 °C (lit.)
• suitability: in accordance for appearance of solution; suitable for acidity or alkalinity (complying)
• storage temp.: 2-8°C
• InChI: 1S/CH2O/c1-2/h1H2
• InChI key: WSFSSNUMVMOOMR-UHFFFAOYSA-N

Description

General description

Buffered picric acid-paraformaldehyde fixative is suitable for use in electron microscopy and light-microscopic immunocytochemistry.

Application

Paraformaldehyde was used in the preparation of azomethine ylide, required for the synthesis of amine-modifying single-walled carbon nanotubes. It was also used in the preparation of α-methylenechromanes, α-methylenequinoline and ortho-quinone methides.

Safety Information

• Pictograms: GHS02,GHS08,GHS05,GHS07
• 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 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