Chromane (benzodihydropyran) is a heterocyclic chemical compound with the chemical formula C₉H₁₀O.^[2] Chromane is a structural feature of more complex compounds including E vitamins (tocopherols and tocotrienols), Dianin's compound, and the pharmaceutical drugs troglitazone, ormeloxifene, and nebivolol. Such compounds are sometimes described as chromans.

Quick Facts Names, Identifiers ...

Chromane

Names
Preferred IUPAC name 3,4-Dihydro-2H-1-benzopyran
Other names Chroman; Benzodihydropyran; Benzoxane
Identifiers
CAS Number	493-08-3 Y
3D model (JSmol)	Interactive image
Beilstein Reference	116150
ChEBI	CHEBI:33224
ChemSpider	120093
EC Number	874-955-4
Gmelin Reference	122981
PubChem CID	136319
UNII	EJ8R7LY9PK Y
CompTox Dashboard (EPA)	DTXSID10197758
InChI InChI=1S/C9H10O/c1-2-6-9-8(4-1)5-3-7-10-9/h1-2,4,6H,3,5,7H2 Key: VZWXIQHBIQLMPN-UHFFFAOYSA-N InChI=1/C9H10O/c1-2-6-9-8(4-1)5-3-7-10-9/h1-2,4,6H,3,5,7H2 Key: VZWXIQHBIQLMPN-UHFFFAOYAB
SMILES C1CC2=CC=CC=C2OC1
Properties
Chemical formula	C9H10O
Molar mass	134.178 g·mol−1
Hazards
GHS labelling:[1]
Pictograms
Signal word	Warning
Hazard statements	H226, H302, H315, H319, H335
Precautionary statements	P210, P233, P240, P241, P242, P243, P261, P264, P264+P265, P270, P271, P280, P301+P317, P302+P352, P303+P361+P353, P304+P340, P305+P351+P338, P319, P321, P330, P332+P317, P337+P317, P362+P364, P370+P378, P403+P233, P403+P235, P405, P501
Related compounds
Related compounds	Tetrahydroquinoline, Tetralin, Chromene, Coumaran
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

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• Chromene (benzopyran)