3,4-Dihydro-2H-pyran

Other Classes -> Ethers, Other

Flammable agents - 3rd degree

Dihydro-2h-pyran appears as a clear colorless liquid with an ethereal odor. Less dense than water. Vapors heavier than air.

Liquid

Clear colorless liquid with an ethereal odor; [CAMEO] Unpleasant odor; [Alfa Aesar MSDS]

Danger

H225 (100%): Highly Flammable liquid and vapor [Danger Flammable liquids]

P210, P233, P240, P241, P242, P243, P261, P264, P264+P265, P272, P280, P302+P352, P303+P361+P353, P305+P351+P338, P321, P332+P317, P333+P317, P337+P317, P362+P364, P370+P378, P403+P235, and P501 (click each P-code to see the statement)

Aggregated GHS information provided per 180 reports by companies from 12 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.

Warning

H317: May cause an allergic skin reaction [Warning Sensitization, Skin]

Chemical: 2H-Pyran, 3,4-dihydro-

2H-Pyran, 3,4-dihydro- is listed on the EPA's Chemical Data Reporting (CDR) system. Manufacturers and importers of 2H-Pyran, 3,4-dihydro- are required to report information about their production and use of this chemical to the EPA under the Toxic Substances Control Act (TSCA). (40 eCFR Part 711)

Status: Active Update: 29-11-2022 https://echa.europa.eu/registration-dossier/-/registered-dossier/12042

2H-Pyran, 3,4-dihydro-: HSNO Approval: HSR001129 Approved with controls

The New Jersey Worker and Community Right to Know Act requires public and private employers to provide information about hazardous substances at their workplaces. (N.J.S.A. 34:5A-1 et. seq.)

Excerpt from ERG Guide 127 [Flammable Liquids (Water-Miscible)]:

· HIGHLY FLAMMABLE: Will be easily ignited by heat, sparks or flames.

Excerpt from ERG Guide 127 [Flammable Liquids (Water-Miscible)]:

· Inhalation or contact with material may irritate or burn skin and eyes.

Ethers, such as DIHYDRO-2H-PYRAN, can act as bases. They form salts with strong acids and addition complexes with Lewis acids. The complex between diethyl ether and boron trifluoride is an example. Ethers may react violently with strong oxidizing agents. In other reactions, which typically involve the breaking of the carbon-oxygen bond, ethers are relatively inert.

2,3-Dihydropyran

UN2376

Class 3 Flammable and combustible liquid (49 eCFR § 173.120)

PG II: the degree of danger presented by the material is medium

Flam. Liq. 2 (100%)

Flammable liquids - Category 2

Skin sensitization - Category 1B

Flammable agents - 3rd degree, Reactive agents - 1st degree

· CALL 911. Then call emergency response telephone number on shipping paper. If shipping paper not available or no answer, refer to appropriate telephone number listed on the inside back cover.

· ELIMINATE all ignition sources (no smoking, flares, sparks or flames) from immediate area.

Excerpt from ERG Guide 127 [Flammable Liquids (Water-Miscible)]:

General First Aid:

Excerpt from ERG Guide 127 [Flammable Liquids (Water-Miscible)]:

Immediate precautionary measure

14 [mg/m3]

150 [mg/m3]

910 [mg/m3]

All Other Basic Organic Chemical Manufacturing

2H-Pyran, 3,4-dihydro-: ACTIVE