Shanghai Nianxing Industrial Co., Ltd
China
Product Name: dimethylmaleic anhydride
Price: Check
Purity: 98.0%
Stocking Period: 10 Day
Contact: Yang
Email: sales@echemcloud.com

Shanghai Jizhi Biochemical Technology Co., Ltd
China
Product Name: dimethylmaleic anhydride
Price: ￥88.0/5g ￥658.0/100g ￥258.0/25g
Purity: 97.0%
Stocking Period: Inquiry
Contact: Liu jia
Email: 2130147988@qq.com

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

766-39-2

766-39-2 structure

766-39-2 structure

Name: dimethylmaleic anhydride
Chemical Name: 2,3-Dimethylmaleic anhydride
CAS Number: 766-39-2
Molecular Formula: C₆H₆O₃
Molecular Weight: 126.110
Catalog: Chemical reagent Organic reagent Carboxylic anhydride
Create Date: 2018-03-30 08:00:00
Modify Date: 2025-08-27 14:11:04

Name	2,3-Dimethylmaleic anhydride
Synonyms	3,4-dimethylmaleic acid anhydride 1-ethoxy-2-methyl-1-methylselanyl-propene Dimethylketol 3,4-Dimethyl-2,5-furandione dimethylmaleic anhydride 2,2'-dimethylmaleic anhydride 3-hydroxy-2-oxobutane 2,5-Furandione, 3,4-dimethyl- 2,3-dimethyl maleic anhydride pyrocinchonic anhydride 2-hydroxybutan-3-one 3,4-dimethylfuran-2,5-dione EINECS 212-165-8 dimethylketene O-ethyl Se-methyl selenoacetal acetylmethylcarbino acetyl methyl carbinol 2,3-Dimethylmaleic anhydride MFCD00005523 2,3-dimethylfumaric anhydride

Density	1.2±0.1 g/cm3
Boiling Point	223.0±0.0 °C at 760 mmHg
Melting Point	93-96 °C(lit.)
Molecular Formula	C₆H₆O₃
Molecular Weight	126.110
Flash Point	95.6±15.9 °C
Exact Mass	126.031693
PSA	43.37000
LogP	0.82
Vapour Pressure	0.1±0.4 mmHg at 25°C
Index of Refraction	1.487
Storage condition	0-6°C

CHEMICAL IDENTIFICATION

RTECS NUMBER :: ON4025000

CHEMICAL NAME :: Maleic anhydride, dimethyl-

CAS REGISTRY NUMBER :: 766-39-2

LAST UPDATED :: 199701

DATA ITEMS CITED :: 2

MOLECULAR FORMULA :: C6-H6-O3

MOLECULAR WEIGHT :: 126.12

WISWESSER LINE NOTATION :: T5VOVJ D1 E1

HEALTH HAZARD DATA

ACUTE TOXICITY DATA

TYPE OF TEST :: TDLo - Lowest published toxic dose

ROUTE OF EXPOSURE :: Subcutaneous

SPECIES OBSERVED :: Rodent - rat

DOSE/DURATION :: 2600 mg/kg/65W-I

TOXIC EFFECTS :: Tumorigenic - equivocal tumorigenic agent by RTECS criteria Tumorigenic - tumors at site of application

REFERENCE :: BJCAAI British Journal of Cancer. (Macmillan Press Ltd., Houndmills, Basingstoke, Hants. RG21 2XS, UK) V.1- 1947- Volume(issue)/page/year: 19,392,1965

Symbol	GHS07
Signal Word	Warning
Hazard Statements	H302-H319
Precautionary Statements	P305 + P351 + P338
Personal Protective Equipment	dust mask type N95 (US);Eyeshields;Gloves
Hazard Codes	Xn:Harmful;
Risk Phrases	R22
Safety Phrases	S45-S36/37/39-S28A-S26
RIDADR	NONH for all modes of transport
WGK Germany	3
RTECS	ON4025000
HS Code	2917190090

Precursor 9
40274-33-7 108-31-6 6631-37-4 89068-54-2
875655-28-0 44873-88-3 110-16-7 504-29-0
64-17-5
DownStream 10
4282-33-1 21788-49-8 27697-13-8 123-56-8
34584-69-5 25060-18-8 30614-77-8 608-40-2
631-64-1 5754-17-6

HS Code	2917190090
Summary	2917190090 acyclic polycarboxylic acids, their anhydrides, halides, peroxides, peroxyacids and their derivatives VAT:17.0% Tax rebate rate:9.0% Supervision conditions:none MFN tariff:6.5% General tariff:30.0%

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