Shanghai Nianxing Industrial Co., Ltd
China
Product Name: 3,4-Dihydro-2-ethoxy-2H-pyran
Price: Check
Purity: 97.0%
Stocking Period: 10 Day
Contact: Yang
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Shanghai Jizhi Biochemical Technology Co., Ltd
China
Product Name: 3,4-Dihydro-2-ethoxy-2H-pyran
Price: ￥368.0/5ml
Purity: 98.0%
Stocking Period: Inquiry
Contact: Liu jia
Email: 2130147988@qq.com

Dayang Chem (Hangzhou) Co., Ltd.
China
Product Name: 2-Ethoxy-3,4-dihydro-2H-pyran
Price: $Inquiry/100g $Inquiry/1kg $Inquiry/100kg $Inquiry/1000kg
Purity: 98.0%
Stocking Period: Inquiry
Contact: Ms Wang
Email: enquiry@dycnchem.com

103-75-3

103-75-3 structure

103-75-3 structure

Name: 3,4-Dihydro-2-ethoxy-2H-pyran
Chemical Name: 2-ethoxy-3,4-dihydro-2h-pyran
CAS Number: 103-75-3
Molecular Formula: C₇H₁₂O₂
Molecular Weight: 128.16900
Create Date: 2018-06-01 08:00:00
Modify Date: 2025-08-24 08:26:33

Name	2-ethoxy-3,4-dihydro-2h-pyran
Synonyms	2-ethoxy-(2H)-3,4-dihydropyran EINECS 203-141-8 ethoxy-2 dihydro-3,4,(2H)-pyranne 6-ethoxy-2,3-dihydropyran 2-Ethoxydihydropyran 2-Ethoxypyran 2-Ethoxy-2,3-dihydro(4H)pyran MFCD00006561 2-Ethoxy-3,4-dihydro-2H-pyran 3,4-dihydro-2-ethoxy-2H-pyran 2-Ethoxy-3,4-dihydropyran 2H-Pyran,2-ethoxy-3,4-dihydro 2-Ethoxy-3,4-dihydro-2-pyran ETHOXYDIHYDROPYRAN

Density	0.957 g/mL at 25 °C(lit.)
Boiling Point	42 °C16 mm Hg(lit.)
Melting Point	-100ºC
Molecular Formula	C₇H₁₂O₂
Molecular Weight	128.16900
Flash Point	76 °F
Exact Mass	128.08400
PSA	18.46000
LogP	1.67310
Vapour Pressure	0.811mmHg at 25°C
Index of Refraction	n20/D 1.439(lit.)
Storage condition	2-8°C

CHEMICAL IDENTIFICATION

RTECS NUMBER :: UP8925000

CHEMICAL NAME :: 2H-Pyran, 2-ethoxy-3,4-dihydro-

CAS REGISTRY NUMBER :: 103-75-3

BEILSTEIN REFERENCE NO. :: 0109855

LAST UPDATED :: 199709

DATA ITEMS CITED :: 6

MOLECULAR FORMULA :: C7-H12-O2

MOLECULAR WEIGHT :: 128.19

WISWESSER LINE NOTATION :: T6O BUTJ FO2

HEALTH HAZARD DATA

ACUTE TOXICITY DATA

TYPE OF TEST :: Open irritation test

ROUTE OF EXPOSURE :: Administration onto the skin

SPECIES OBSERVED :: Rodent - rabbit

REFERENCE :: AIHAAP American Industrial Hygiene Association Journal. (AIHA, 475 Wolf Ledges Pkwy., Akron, OH 44311) V.19- 1958- Volume(issue)/page/year: 23,95,1962

TYPE OF TEST :: Standard Draize test

ROUTE OF EXPOSURE :: Administration into the eye

SPECIES OBSERVED :: Rodent - rabbit

REFERENCE :: UCDS** Union Carbide Data Sheet. (Union Carbide Corp., 39 Old Ridgebury Rd., Danbury, CT 06817) Volume(issue)/page/year: 7/15/1971 ** ACUTE TOXICITY DATA **

TYPE OF TEST :: LD50 - Lethal dose, 50 percent kill

ROUTE OF EXPOSURE :: Oral

SPECIES OBSERVED :: Rodent - rat

DOSE/DURATION :: 6160 mg/kg

TOXIC EFFECTS :: Details of toxic effects not reported other than lethal dose value

REFERENCE :: UCDS** Union Carbide Data Sheet. (Union Carbide Corp., 39 Old Ridgebury Rd., Danbury, CT 06817) Volume(issue)/page/year: 7/15/1971

TYPE OF TEST :: LCLo - Lowest published lethal concentration

ROUTE OF EXPOSURE :: Inhalation

SPECIES OBSERVED :: Rodent - rat

DOSE/DURATION :: 8000 ppm/4H

TOXIC EFFECTS :: Details of toxic effects not reported other than lethal dose value

REFERENCE :: AIHAAP American Industrial Hygiene Association Journal. (AIHA, 475 Wolf Ledges Pkwy., Akron, OH 44311) V.19- 1958- Volume(issue)/page/year: 23,95,1962

TYPE OF TEST :: LD50 - Lethal dose, 50 percent kill

ROUTE OF EXPOSURE :: Administration onto the skin

SPECIES OBSERVED :: Rodent - rabbit

DOSE/DURATION :: 3560 uL/kg

TOXIC EFFECTS :: Details of toxic effects not reported other than lethal dose value

REFERENCE :: UCDS** Union Carbide Data Sheet. (Union Carbide Corp., 39 Old Ridgebury Rd., Danbury, CT 06817) Volume(issue)/page/year: 7/15/1971

Hazard Codes	Xi: Irritant;
Risk Phrases	R10
Safety Phrases	S26
RIDADR	UN 3271 3/PG 3
WGK Germany	2
RTECS	UP8925000
Packaging Group	III
Hazard Class	3.2
HS Code	2932999099

109-92-2 structure

109-92-2

107-02-8 structure

107-02-8

~81%

103-75-3 structure

103-75-3

Literature: Danishefsky, Samuel; Bednarski, Mark Tetrahedron Letters, 1984 , vol. 25, # 7 p. 721 - 724

Precursor 2
109-92-2 107-02-8
DownStream 9
20426-69-1 18593-33-4 111-30-8 3149-11-9
3149-12-0 4454-01-7 110-87-2 88083-42-5
88083-43-6

HS Code	2932999099
Summary	2932999099. other heterocyclic compounds with oxygen hetero-atom(s) only. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:20.0%

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