Hydracrylic Acid
Title: Hydracrylic Acid
CAS Registry Number: 503-66-2
CAS Name: 3-Hydroxypropanoic acid
Additional Names: b-hydroxypropionic acid; ethylene lactic acid
Molecular Formula: C3H6O3
Molecular Weight: 90.08
Percent Composition: C 40.00%, H 6.71%, O 53.28%
Line Formula: CH2OHCH2COOH
Literature References: Prepd by alkaline hydrolysis of the nitrile: R. R. Read, Org. Synth. coll. vol. I, 321 (2nd ed., 1941).
Properties: Viscous liq. Strong acid, pK (25°): 4.51. On distn or boiling with 50% H2SO4 dec into water and acrylic acid. Very sol in water, sol in alcohol, miscible with ether.
pKa: pK (25°): 4.51
 
Derivative Type: Sodium salt
Molecular Formula: NaC3H5O3
Molecular Weight: 112.06
Percent Composition: Na 20.52%, C 32.15%, H 4.50%, O 42.83%
Properties: Deliquescent crystals, mp 143°.
Melting point: mp 143°
 
Derivative Type: Calcium salt dihydrate
Molecular Formula: Ca(C3H5O3)2.2H2O
Molecular Weight: 254.25
Percent Composition: Ca 15.76%, C 28.34%, H 5.55%, O 50.34%
Properties: Prisms, mp 140-145°; freely sol in cold water.
Melting point: mp 140-145°

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