Dihydro-2H-pyran-4(3H)-one

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For R&D use only.

Catalog NO.：A5539
CAS No. : 29943-42-8
Molecular Formula：C₅H₈O₂
Molecular Weight： 100.12

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Product Details

CAS Number	29943-42-8	Appearance
Catalog Number	A5539	MDL Number	MFCD00006581
Molecular Formula	C₅H₈O₂	Molecular Weight	100.12
Boiling Point	166-166.5℃ at 760 mmHg	Melting Point
Flash Point		Density	1.084(lit.)
Synonyms	Dihydro-2H-pyran-4(3H)-one
Storage Condition	Store in a tightly closed container,in a cool and dry place

Safety

GHS Pictogram
Signal Word	Warning	UN Number
Hazard Statements	H317-H319	Class
Precautionary Statements	P280-P305+P351+P338	Packing Group

Description

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P337	If eye irritation persists:
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P303 + P361 + P353	IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower.
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P304 + P340	IF INHALED: Remove victim to fresh air and Keep at rest in a position comfortable for breathing.
P304 + P341	IF INHALED: If breathing is difficult, remove victim to fresh air and keep at rest in a position comfortable for breathing.
P305 + P351 + P338	IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
P306 + P360	IF ON CLOTHING: Rinse Immediately contaminated CLOTHING and SKIN with plenty of water before removing clothes.
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P370 + P378	In case of fire: Use … for extinction.
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P401	Store …
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P410 + P403	Protect from sunlight. Store in a well-ventilated place.
P410 + P412	Protect from sunlight. Do not expose to temperatures exceeding 50 oC/122oF.
P411 + P235	Store at temperatures not exceeding … oC/…oF. Keep cool.

P501	Dispose of contents/container to..…
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H200	Explosives (Unstable Explosive)
H201	Explosives （Div 1.1)
H202	Explosives (Div 1.2)
H203	Explosives (Div 1.3)
H204	Explosives (Div 1.4)
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H251	Self-heating substances and mixtures (Category 1)
H252	Self-heating substances and mixtures (Category 2)
H260	Substances And Mixtures Which, In Contact With Water,Emit Flammable Gases (Category 1)
H261	Substances And Mixtures Which, In Contact With Water,Emit Flammable Gases (Category 2)
H261	Substances And Mixtures Which, In Contact With Water,Emit Flammable Gases (Category 3)
H270	Oxidising gases (Category 1)
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H280	Gases under pressure Compressed gas Liquefied gas Dissolved gas
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H290	Corrosive to Metals (Category 1)

H300	Acute toxicity,oral (Category 1, 2)
H301	Acute toxicity,oral (Category 3)
H302	Acute toxicity,oral (Category 4)
H303	Acute toxicity,oral (Category 5)
H304	Aspiration hazard (Category 1)
H305	Aspiration hazard (Category 2)
H310	Acute toxicity,dermal (Category 1, 2)
H311	Acute toxicity,dermal (Category 3)
H312	Acute toxicity,dermal (Category 4)
H313	Acute toxicity,dermal (Category 5)
H314	Skin corrosion/irritation (Category 1A, B, C)
H315	Skin corrosion/irritation (Category 2)
H316	Skin corrosion/irritation (Category 3)
H317	Sensitisation, Skin (Category 1)
H318	Serious eye damage/eye irritation (Category 1)
H319	Serious eye damage/eye irritation (Category 2A)
H320	Serious eye damage/eye irritation (Category 2B)
H330	Acute toxicity,inhalation (Category 1, 2)
H331	Acute toxicity,inhalation (Category 3)
H332	Acute toxicity,inhalation (Category 4)
H333	Acute toxicity,inhalation (Category 5)
H334	Sensitisation, respiratory (Category 1)
H335	Specific target organ toxicity, single exposure; Respiratory tract irritation (Category 3)
H336	Specific target organ toxicity,single exposure; Narcoticeffects (Category 3)
H340	Germ cell mutagenicity (Category 1A, 1B)
H341	Germ cell mutagenicity (Category 2)
H350	Carcinogenicity (Category 1A, 1B)
H351	Carcinogenicity (Category 2)
H360	Reproductive toxicity (Category 1A, 1B)
H361	Reproductive toxicity (Category 2)
H362	Reproductive toxicity, effects on or via lactation (Additional category)
H370	Specific target organ toxicity, single exposure (Category 1)
H371	Specific target organ toxicity, single exposure (Category 2)
H372	Specific target organ toxicity, repeated exposure (Category 1)
H373	Specific target organ toxicity, repeated exposure (Category 2)

H400	Hazardous to the aquatic environment, acute hazard (Category 1)
H401	Hazardous to the aquatic environment, acute hazard (Category 2)
H402	Hazardous to the aquatic environment, acute hazard (Category 3)
H410	Hazardous to the aquatic environment, long-term hazard(Category 1)
H411	Hazardous to the aquatic environment, long-term hazard (Category 2)
H412	Hazardous to the aquatic environment, long-term hazard (Category 3)
H413	Hazardous to the aquatic environment, long-term hazard (Category 4)
H420	Hazardous to the ozone layer (Category 1)