Dayang Chem (Hangzhou) Co., Ltd.
China
Product Name: 2H-Pyran,2-ethoxy-3,4-dihydro-4-methyl-
Price: $Inquiry/100g $Inquiry/1kg $Inquiry/100kg $Inquiry/1000kg
Purity: 98.0%
Stocking Period: Inquiry
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10138-44-0

10138-44-0 structure

Name: 2H-Pyran,2-ethoxy-3,4-dihydro-4-methyl-
Chemical Name: 2-ethoxy-4-methyl-3,4-dihydro-2H-pyran
CAS Number: 10138-44-0
Molecular Formula: C₈H₁₄O₂
Molecular Weight: 142.19600
Create Date: 2017-02-23 18:50:18
Modify Date: 2025-09-19 10:10:54

Name	2-ethoxy-4-methyl-3,4-dihydro-2H-pyran
Synonyms	2H-Pyran,2-ethoxy-3,4-dihydro-4-methyl 2H-Pyran,4-dihydro-4-methyl opt. Inakt. 2-Ethoxy-4-methyl-3.4-dihydro-2H-pyran 2-Ethoxy-4-methyl-3,4-dihydropyran 2-ethoxy-2,3-dihydro-4-methyl-4H-pyran 2H-Pyran,3,4-dihydro-2-ethoxy-4-methyl 2-Ethoxy-4-methyl-2,3-dihydro-4H-pyran 2-Aethoxy-4-methyl-3,4-dihydro-2H-pyran

Density	0.95g/cm3
Boiling Point	184.8ºC at 760mmHg
Molecular Formula	C₈H₁₄O₂
Molecular Weight	142.19600
Flash Point	58.3ºC
Exact Mass	142.09900
PSA	18.46000
LogP	1.91910
Vapour Pressure	0.986mmHg at 25°C
Index of Refraction	1.453

CHEMICAL IDENTIFICATION

RTECS NUMBER :: UP9100000

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

CAS REGISTRY NUMBER :: 10138-44-0

LAST UPDATED :: 199806

DATA ITEMS CITED :: 4

MOLECULAR FORMULA :: C8-H14-O2

MOLECULAR WEIGHT :: 142.22

WISWESSER LINE NOTATION :: T6O BUTJ D1 FO2

HEALTH HAZARD DATA

ACUTE TOXICITY DATA

TYPE OF TEST :: Standard Draize test

ROUTE OF EXPOSURE :: Administration onto the skin

SPECIES OBSERVED :: Rodent - rabbit

REFERENCE :: 85JCAE "Prehled Prumyslove Toxikologie; Organicke Latky," Marhold, J., Prague, Czechoslovakia, Avicenum, 1986 Volume(issue)/page/year: -,803,1986

TYPE OF TEST :: Standard Draize test

ROUTE OF EXPOSURE :: Administration into the eye

SPECIES OBSERVED :: Rodent - rabbit

REFERENCE :: 85JCAE "Prehled Prumyslove Toxikologie; Organicke Latky," Marhold, J., Prague, Czechoslovakia, Avicenum, 1986 Volume(issue)/page/year: -,803,1986 ** ACUTE TOXICITY DATA **

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

ROUTE OF EXPOSURE :: Oral

SPECIES OBSERVED :: Rodent - rat

DOSE/DURATION :: 3400 mg/kg

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

REFERENCE :: AMIHBC AMA Archives of Industrial Hygiene and Occupational Medicine. (Chicago, IL) V.2-10, 1950-54. For publisher information, see AEHLAU. Volume(issue)/page/year: 10,61,1954

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

ROUTE OF EXPOSURE :: Administration onto the skin

SPECIES OBSERVED :: Rodent - rabbit

DOSE/DURATION :: 1060 uL/kg

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

REFERENCE :: AMIHBC AMA Archives of Industrial Hygiene and Occupational Medicine. (Chicago, IL) V.2-10, 1950-54. For publisher information, see AEHLAU. Volume(issue)/page/year: 10,61,1954

HS Code	2932999099

109-92-2

123-73-9

~99%

10138-44-0

Literature: Jenner, Gerard; Salem, Ridha Ben New Journal of Chemistry, 2000 , vol. 24, # 4 p. 203 - 207

123-73-9

109-92-2

10138-44-0

Literature: Snider, Barry B.; Phillips, Gary B. Journal of Organic Chemistry, 1983 , vol. 48, # 17 p. 2789 - 2792

Precursor 2
109-92-2 123-73-9
DownStream 4
4457-72-1 4457-71-0 108-89-4 6280-15-5

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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