反式二苯乙烯

Description

trans-Stilbene · CAS 103-30-0 · C14H12. UNII 3FA7NW80A0. Boiling Point: 583 to 585 °F at 760 mmHg (NTP, 1992); Boiling Point: 306-307 °C @ 760 mm Hg; Melting Point: 255 to 257 °F (NTP, 1992).

Identification

CAS Registry Number	103-30-0
PubChem CID	638088
Molecular formula	C14H12
IUPAC name	(E)-stilbene
UNII (FDA)	3FA7NW80A0

Computed Descriptors

Molecular Weight	180.24
XLogP3	4.8
Hydrogen Bond Donor Count	0
Hydrogen Bond Acceptor Count	0
Rotatable Bond Count	2
Exact Mass	180.093900383
Monoisotopic Mass	180.093900383
Topological Polar Surface Area	0
Heavy Atom Count	14
Formal Charge	0

Physical & Chemical Properties

Boiling Point	583 to 585 °F at 760 mmHg (NTP, 1992)
Boiling Point	306-307 °C @ 760 mm Hg
Melting Point	255 to 257 °F (NTP, 1992)
Melting Point	124 °C
Solubility	2.90X10-1 mg/l in water at 25 °C
Density	0.9707
Vapor Pressure	0.000881 [mmHg]
Vapor Pressure	8.81X10-4 mm Hg @ 25 °C
LogP	log Kow = 4.81
LogP	4.59

Physical description & handling notes

• Trans-stilbene appears as off-white crystals. Melting point of 122-124 °C. Shows blue fluorescence. (NTP, 1992)
• Colorless or pale yellow solid; [HSDB] Off-white solid with blue fluorescence; [CAMEO] White or off-white crystalline solid; [MSDSonline]
• Crystals from 95% ethanol
• Colorless or slightly yellow crystals
• Insoluble (NTP, 1992)
• Freely sol in benzene, ether; practically insol in water; sol in 90 parts cold alc, 13 parts boiling alc

Regulatory Status

GHS notification summary	4% (2 / 50)

GHS Hazard Classification

GHS notification summary	4% (2 / 50)
Reported hazard statements	H302 (94%), H319 (92%), H411 (92%)

Documented Uses

• Used to make dyes and optical bleaches; as phosphors and scintillators (crystal forms); [HSDB]
• Mfr of dyes and optical bleaches; crystals are used as phosphors and scintillators
• Trans-form prepd by Clemmensen redn of benzoin: Shriner, Berger, Org Syn Coll Vol III, 786 (1955); cis-form by copper-chromite decarboxylation of alpha-phenylcinnamic acid: Buckles, Wheeler, Org Synth Coll Vol IV, 857 (1963).
• Synthesis of cis- and trans-forms by Wittig reaction and decarboxylation of phenylcinnamic acids: Wheeler, Batlle de Pabon, J Org Chem 30, 1473 (1965).
• By passing toluene over hot lead oxide. Method of purification: crystallization; zone melting used for very pure crystals.
• (1977) NOT PRODUCED COMMERCIALLY IN US

Synonyms

trans-Stilbene; 103-30-0; (E)-Stilbene; (E)-1,2-Diphenylethene; TRANS-1,2-DIPHENYLETHYLENE; (E)-1,2-Diphenylethylene; Toluylene; trans-Diphenylethene; trans-1,2-Diphenylethene; Benzene, 1,1'-(1E)-1,2-ethenediylbis-; trans-alpha,beta-Diphenylethylene; DTXSID4026050; Benzene, 1,1'-(1,2-ethenediyl)bis-, (E)-; 3FA7NW80A0; NSC-2069; STILBENE, TRANS-

Frequently Asked Questions

What are the CAS number and molecular formula of trans-Stilbene?

CAS 103-30-0; molecular formula C14H12; molecular weight — g/mol.

What other names is trans-Stilbene known by?

trans-Stilbene, 103-30-0, (E)-Stilbene, (E)-1,2-Diphenylethene, TRANS-1,2-DIPHENYLETHYLENE, (E)-1,2-Diphenylethylene.

Is trans-Stilbene classified as hazardous?

4% of GHS notifications report no hazard classification (2 of 50).

What are the key physical properties of trans-Stilbene?

Boiling Point: 583 to 585 °F at 760 mmHg (NTP, 1992); Boiling Point: 306-307 °C @ 760 mm Hg; Melting Point: 255 to 257 °F (NTP, 1992); Melting Point: 124 °C.

Facts on this page are taken from PubChem (US National Library of Medicine) and Wikidata. Grade-specific data — assay, moisture, particle size, packaging, shelf life — is issued per batch on the COA and is not published here.