ChemicalBook CAS DataBase List 100-73-2

100-73-2

Name	2-Formyl-3,4-dihydro-2H-pyran
CAS	100-73-2
EINECS(EC#)	202-884-5
Molecular Formula	C6H8O2
MDL Number	MFCD00059170
Molecular Weight	112.13
MOL File	100-73-2.mol

Synonyms

Acrolein dimer(stabilized) Pyranaldehyde 2,3-Dihydro-1,4-pyran-2-karboxaldehyd 2,6-epoxy-5-hexena 2,6-epoxy-5-Hexenal 2-Formyl-3,4-dihydro-2H-pyran 2-Formyl-3,4-dihydro-2N-pyran 2H-Pyran-2-carboxaldehyde, 3,4-dihydro- 2H-Pyran-2-carboxaldehyde,3,4-dihydro- 2-Propenal dimer 3,4-Dihydro-2-carboxaldehyde-2H-pyran 3,4-Dihydro-2-formyl-2H-pyran 3,4-Dihydro-2H-pyran-2-carbaldehyde 3,4-dihydro-2h-pyran-2-carboxaldehyd 3,4-Dihydro-2H-pyran-2-carboxaldehyde 5-Hexenal, 2,6-epoxy- Acroleindimer Pyran aldehyde (Acrolein dimer) 2-formyl-2,3-dihydropyran acrylaldehyde dimer

Chemical Properties

Melting point	-99.9°C
Boiling point	146 °C(lit.)
density	1.08 g/mL at 25 °C
refractive index	n20/D 1.466(lit.)
Fp	54 °C
LogP	-0.388 (est)
CAS DataBase Reference	100-73-2(CAS DataBase Reference)
NIST Chemistry Reference	Acrolein dimer(100-73-2)
EPA Substance Registry System	100-73-2(EPA Substance)

Safety Data

Symbol(GHS)	GHS07,GHS02,GHS05
Signal word	Danger
Hazard statements	H318-H312-H226-H315-H335-H332
Precautionary statements	P264-P280-P302+P352-P321-P332+P313-P362-P280-P305+P351+P338-P310-P280-P302+P352-P312-P322-P363-P501-P261-P271-P304+P340-P312
Hazard Codes	Xn
Risk Statements	R10:Flammable. R20/21/22:Harmful by inhalation, in contact with skin and if swallowed . R36/37/38:Irritating to eyes, respiratory system and skin . R41:Risk of serious damage to eyes. less more
Safety Statements	S16:Keep away from sources of ignition-No smoking . S26:In case of contact with eyes, rinse immediately with plenty of water and seek medical advice . S33:Take precautionary measures against static discharges . S36/37/39:Wear suitable protective clothing, gloves and eye/face protection . S45:In case of accident or if you feel unwell, seek medical advice immediately (show label where possible) . less more
RIDADR	UN 2607
RTECS	UP6825000
TSCA	TSCA listed
HazardClass	3.2
PackingGroup	III
Safety Profile	Mildly toxic by ingestion. A skin and severe eye irritant. A flammable liquid when exposed to heat, flame, or powerful oxidizing agents. To fight fire, use alcohol foam and multipurpose dry chemical. When heated to decomposition it emits acrid smoke and fumes less more

Hazard Information

General Description

A colorless or yellow liquid with a pungent disagreeable odor. Flash point 118°F. Density 1.077 g/cm3 (8.96 lb/gal). May be irritating to the eyes and mucous membranes; long-term exposure may result in adverse health effects. Vapors denser than air. Used to make other chemicals, plastics.

Reactivity Profile

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.

Air & Water Reactions

Flammable. Soluble in water.

Health Hazard

May cause toxic effects if inhaled or absorbed through skin. Inhalation or contact with material may irritate or burn skin and eyes. Fire will produce irritating, corrosive and/or toxic gases. Vapors may cause dizziness or suffocation. Runoff from fire control or dilution water may cause pollution.

Fire Hazard

HIGHLY FLAMMABLE: Will be easily ignited by heat, sparks or flames. Vapors may form explosive mixtures with air. Vapors may travel to source of ignition and flash back. Most vapors are heavier than air. They will spread along ground and collect in low or confined areas (sewers, basements, tanks). Vapor explosion hazard indoors, outdoors or in sewers. May polymerize explosively when heated or involved in a fire. Runoff to sewer may create fire or explosion hazard. Containers may explode when heated. Many liquids are lighter than water.

Chemical Properties

Colorless viscous liquid

Uses

NSC 95413 is used as a reagent in chemical processes.

Synthesis Reference(s)

Journal of the American Chemical Society, 92, p. 3126, 1970 DOI: 10.1021/ja00713a034

Material Safety Data Sheet(MSDS)

Spectrum Detail

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