Formaldehyde (Formalin) technical CAS 50-00-0
Technical formalin is a concentrated solution of formaldehyde (about 40%) stabilized with methanol to prevent conversion to paraformaldehyde. It is widely used in the synthesis of plastics, disinfection and preservation of tissues. It is toxic, has a strong odor and requires strict safety measures.
1. Physicochemical principles
Formalin is a liquid form of aldehyde, where formaldehyde CH₂O is dissolved and partially interacts with water. The presence of free formaldehyde in equilibrium with methylene glycol determines its aggressive and biocidal properties.
2. Chemical properties
CAS: 50-00-0 (formaldehyde as an active substance)
Formula: CH₂O (gas) in hydrated forms
Solubility: completely miscible with water and alcohols
Decomposition: formation of a white precipitate (paraformaldehyde) is observed during long-term storage
3. Applications
Polymer industry: starting material for various resins, adhesives, plastics.
Medical preservation: fixation of anatomical preparations (surgery, pathological anatomy).
Agriculture: a means for disinfecting inventory, in veterinary medicine (with caution).
4. Toxicological profile
Effect on the body: irritates the skin, eyes, respiratory tract; when inhaled in high concentrations, it causes pulmonary edema, systemic intoxication.
Carcinogenicity: formaldehyde is classified as a human carcinogen with prolonged exposure.
Protective measures: use of sealed chambers, rubber gloves, glasses, respirators.
5. Storage and handling
Temperature: moderate (15–25 °C), without sharp fluctuations to avoid sedimentation.
Container: made of corrosion-resistant materials (plastic, stainless steel).
Compatibility: store separately from strong acids, bases and oxidizers, as violent reactions are possible.
6. Summary
Technical formalin, being a concentrated solution of formaldehyde, plays a significant role in a number of chemical-technological processes and military-medical applications. Its aggressive properties and toxicity urgently require strict safety regulations and proper disposal of residues.
