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Propan-2-ylidenepropanedioic acid, also known as methylidene malonic acid, is an organic compound with the chemical formula C6H8O4. It is a dicarboxylic acid derivative, featuring a methylidene group (-CH2) bridging two carbon atoms in the propanoic acid backbone. propan-2-ylidenepropanedioic acid is a key intermediate in various chemical syntheses, particularly in the preparation of barbiturates and other pharmaceuticals. It is synthesized through the condensation of acetone with malonic acid in the presence of a strong base, such as sodium hydroxide. Propan-2-ylidenepropanedioic acid is a white crystalline solid that is soluble in water and has a melting point of approximately 95-97°C. Its chemical structure and reactivity make it a valuable building block in the synthesis of complex organic molecules, highlighting its importance in the field of organic chemistry and pharmaceuticals.

4441-90-1

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4441-90-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 4441-90-1 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 4,4,4 and 1 respectively; the second part has 2 digits, 9 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 4441-90:
(6*4)+(5*4)+(4*4)+(3*1)+(2*9)+(1*0)=81
81 % 10 = 1
So 4441-90-1 is a valid CAS Registry Number.

4441-90-1SDS

SAFETY DATA SHEETS

According to Globally Harmonized System of Classification and Labelling of Chemicals (GHS) - Sixth revised edition

Version: 1.0

Creation Date: Aug 18, 2017

Revision Date: Aug 18, 2017

1.Identification

1.1 GHS Product identifier

Product name Isopropyliden-malonsaeure

1.2 Other means of identification

Product number -
Other names 3-methyl-1,1-bis-methylsulfanyl-buta-1,2-diene

1.3 Recommended use of the chemical and restrictions on use

Identified uses For industry use only.
Uses advised against no data available

1.4 Supplier's details

1.5 Emergency phone number

Emergency phone number -
Service hours Monday to Friday, 9am-5pm (Standard time zone: UTC/GMT +8 hours).

More Details:4441-90-1 SDS

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