1.04003

Formaldehyde solution about 37%

GR for analysis stabilized with about 10% methanol ACS,Reag. Ph Eur

• Synonym(s): Formaldehyde solution, Formaline solution, Methanal solution, Methylaldehyde solution, Formalin
• Linear Formula: HCHO
• CAS Number: 50-00-0
• Molecular Weight: 30.03
• Beilstein/REAXYS Number: 1209228
• MDL number: MFCD00003274
• UNSPSC Code: 12352114
• NACRES: NA.21

Properties

• grade: ACS reagent
• Quality Level: 400
• agency: reag. Ph. Eur.
• vapor density: 1.03 (vs air)
• vapor pressure: 52 mmHg ( 37 °C)
• form: liquid
• autoignition temp.: 300 °C (Formaldehyde); 572 °F
• expl. lim.: 7-73 % (v/v) Formaldehyde)
• concentration: 36.5-38.0% (iodometric, acidimetric)
• pH: 2.8-4.0 (20 °C in H₂O)
• bp: 93-96 °C/1013 hPa
• mp: <-15 °C
• transition temp: flash point 62 °C (Formaldehyde)
• density: 1.09 g/cm³ at 20 °C; 1.09 g/mL at 25 °C (lit.)
• application(s): diagnostic assay manufacturing; hematology; histology
• storage temp.: 15-25°C
• SMILES string: [H]C([H])=O
• InChI: 1S/CH2O/c1-2/h1H2
• InChI key: WSFSSNUMVMOOMR-UHFFFAOYSA-N

Description

General description

Formaldehyde (HCOH) is one of the most familiar and effective fixatives. The fixation of the histological specimen material of human or animal origin is commonly performed in a 4% or 10% Formaldehyde solution. Chemically, the 4 % Formaldehyde solution equals a 10 % Formalin solution.

Analysis Note

Assay (acidimetric): 36.5 - 38.0 %
Assay (iodometric): 36.5 - 38.0 %
Identity: passes test
Color: ≤ 10 Hazen
Appearance of solution: passes test
Free acid (as HCOOH): ≤ 0.025 %
Density (20 °C): 1.080 - 1.090 g/ml
Chloride (Cl): ≤ 0.0001 %
Sulfate (SO₄): ≤ 0.002 %
Heavy metals (as Pb): ≤ 0.0002 %
Fe (Iron): ≤ 0.0001 %
Methanol (GC): 9.0 - 11.0 %
Sulfated ash: ≤ 0.002 %

Safety Information

• pictograms: GHS06,GHS08,GHS05
• signalword: Danger
• hcodes: H301 + H311,H314,H317,H330,H335,H341,H350,H370
• pcodes: P202 - P260 - P280 - P303 + P361 + P353 - P304 + P340 + P310 - P305 + P351 + P338
• Hazard Classifications: Acute Tox. 2 Inhalation - Acute Tox. 3 Dermal - Acute Tox. 3 Oral - Carc. 1B - Eye Dam. 1 - Muta. 2 - Skin Corr. 1B - Skin Sens. 1 - STOT SE 1 - STOT SE 3
• target_organs: Eyes,Central nervous system, Respiratory system
• Storage Class: 6.1A - Combustible acute toxic Cat. 1 and 2 / very toxic hazardous materials
• wgk_germany: WGK 3
• flash_point_f: 143.6 °F - closed cup
• flash_point_c: 62 °C - closed cup