2,2-Dimethylsuccinic acid

What is 2,2-Dimethylsuccinic acid ?

white crystalline powder

ChEBI: An alpha,omega-dicarboxylic acid that is succinic acid substituted by two methyl groups at positions 2 and 2 respectively.

Journal of the American Chemical Society, 71, p. 3418, 1949 DOI: 10.1021/ja01178a044
Synthesis, p. 710, 1980 DOI: 10.1055/s-1980-29181

Crystallise the acid from EtOH/ether or EtOH/chloroform. [Beilstein 2 IV 1996.]

Melting point:	138-142 °C (lit.)
Boiling point:	311.39°C (rough estimate)
Density	1.4528 (rough estimate)
refractive index	1.4328 (estimate)
storage temp.	Sealed in dry,Room Temperature
form	powder to crystal
pka	3.80±0.10(Predicted)
color	White to Almost white
Water Solubility	70g/L(14 ºC)
BRN	1764476
CAS DataBase Reference	597-43-3(CAS DataBase Reference)
NIST Chemistry Reference	2,2-Dimethylbutanedioic acid(597-43-3)

Signal word	Warning
Pictogram(s)	Exclamation Mark Irritant GHS07
GHS Hazard Statements	H315:Skin corrosion/irritation H319:Serious eye damage/eye irritation H335:Specific target organ toxicity, single exposure;Respiratory tract irritation
Precautionary Statement Codes	P261:Avoid breathing dust/fume/gas/mist/vapours/spray. P264:Wash hands thoroughly after handling. P264:Wash skin thouroughly after handling. P271:Use only outdoors or in a well-ventilated area. P280:Wear protective gloves/protective clothing/eye protection/face protection. P302+P352:IF ON SKIN: wash with plenty of soap and water. P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.