2-Formyl-3,4-dihydro-2H-pyran

Flammable Liquid

ERG2024, Guide 129P (Acrolein dimer, stabilized): In Canada, an Emergency Response Assistance Plan (ERAP) may be required for this product. Please consult the shipping paper and/or the "ERAP" section.

ERG2024, Guide 129P (Acrolein dimer, stabilized): · Many liquids will float on water.

FIRE INVOLVING TANKS, RAIL TANK CARS OR HIGHWAY TANKS: Fight fire from maximum distance or use unmanned master stream devices or monitor nozzles. Cool containers with flooding quantities of water until well after fire is out. Withdraw immediately in case of rising sound from venting safety devices or discoloration of tank. ALWAYS stay away from tanks in direct contact with flames. For massive fire, use unmanned master stream devices or monitor nozzles; if this is impossible, withdraw from area and let fire burn. (ERG, 2024)

LC50 (rat) = 3,225 ppm/4hr

ERG2024, Guide 129P (Acrolein dimer, stabilized): · Runoff from fire control or dilution water may cause environmental contamination.

Polymerizable Compounds

Neurotoxin - Other CNS neurotoxin

A mild skin irritant; Causes respiratory depression and lung changes in inhalation lethal-concentration studies of rats; Causes changes in bladder weight, changes in platelet count, and effects on other proteins in 9-day intermittent inhalation studies of rats; [RTECS] May cause eye and mucous membrane irritation; [CAMEO] May polymerize; An irritant that may cause serious eye injury; Harmful by ingestion, inhalation, and skin absorption; Inhalation of high concentrations may cause weakness, dizziness, and unconsciousness; [Sigma-Aldrich MSDS] Acrolein dimer, stabilized (UN2607) has warning of explosive polymerization; [ERG 2016]

2607 129P

Polymerizable

Aldehydes are frequently involved in self-condensation or polymerization reactions. These reactions are exothermic; they are often catalyzed by acid. Aldehydes are readily oxidized to give carboxylic acids. Flammable and/or toxic gases are generated by the combination of aldehydes with azo, diazo compounds, dithiocarbamates, nitrides, and strong reducing agents. Aldehydes can react with air to give first peroxo acids, and ultimately carboxylic acids. These autoxidation reactions are activated by light, catalyzed by salts of transition metals, and are autocatalytic (catalyzed by the products of the reaction). The addition of stabilizers (antioxidants) to shipments of aldehydes retards autoxidation.

LARGE SPILL: Dike far ahead of liquid spill for later disposal. Water spray may reduce vapor, but may not prevent ignition in closed spaces. (ERG, 2024)

New Zealand EPA Inventory of Chemical Status: 2H-Pyran-2-carboxaldehyde, 3,4-dihydro-: HSNO Approval: HSR001240 Approved with controls

Flammable. Soluble in water.

Evacuation: ERG2024, Guide 129P (Acrolein dimer, stabilized): · If tank, rail tank car or highway tank is involved in a fire, ISOLATE for 800 meters (1/2 mile) in all directions; also, consider initial evacuation for 800 meters (1/2 mile) in all directions.

Placard/Label(s)

Spill or Leak: ERG2024, Guide 129P (Acrolein dimer, stabilized): · Water spray may reduce vapor, but may not prevent ignition in closed spaces.

Flammable agents - 2nd degree, Reactive agents - 1st degree

Wear positive pressure self-contained breathing apparatus (SCBA). Structural firefighters' protective clothing provides thermal protection but only limited chemical protection. (ERG, 2024)

Emergency Response: ERG2024, Guide 129P (Acrolein dimer, stabilized): · For massive fire, use unmanned master stream devices or monitor nozzles; if this is impossible, withdraw from area and let fire burn.

Protective Clothing: ERG2024, Guide 129P (Acrolein dimer, stabilized): · Structural firefighters' protective clothing provides thermal protection but only limited chemical protection.