3-Hydroxybutanal

3-Hydroxybutanal
Names
	Preferred IUPAC name 3-Hydroxybutanal
	Other names Acetaldol; 3-Hydroxybutyraldehyde; beta-Hydroxybutyraldehyde; β-Hydroxybutyraldehyde;
Identifiers
CAS Number	107-89-1 (R/S) ; 117706-97-5 (R) ; 117706-98-6 (S) ;
3D model (JSmol)	Interactive image;
ChemSpider	7609 (R/S) ; 18915429 (R) ;
ECHA InfoCard	100.003.210
EC Number	203-530-2;
MeSH	3-hydroxybutanal
PubChem CID	7897 (R/S); 13061653 (R);
UNII	8C6G962B53 ;
CompTox Dashboard (EPA)	DTXSID2050407 ;
	InChI InChI=1S/C4H8O2/c1-4(6)2-3-5/h3-4,6H,2H2,1H3 Key: HSJKGGMUJITCBW-UHFFFAOYSA-N ; InChI=1/C4H8O2/c1-4(6)2-3-5/h3-4,6H,2H2,1H3 Key: HSJKGGMUJITCBW-UHFFFAOYAI;
	SMILES CC(O)CC=O;
Properties
Chemical formula	C4H8O2
Molar mass	88.106 g·mol−1
Appearance	colorless liquid
Density	0.98 g/mL
Boiling point	162 °C (324 °F; 435 K)
Related compounds
Related aldehydes	Glycolaldehyde; Lactaldehyde
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). verify (what is ?) Infobox references

In organic chemistry, 3-hydroxybutanal (acetaldol, aldol) is an organic compound with the formula CH₃CH(OH)CH₂CHO and the structure H₃C−CH(OH)−CH₂−CH=O. It is classified as an aldol (R−CH(OH)−CHR'−C(=O)−R") and the word "aldol" can refer specifically to 3-hydroxybutanal. It is formally the product of the dimerization of acetaldehyde (CH₃CHO). A thick colorless or pale-yellow liquid, it is a versatile and valuable intermediate with diverse impacts. The compound is chiral although this aspect is not often exploited.

Names

Preferred IUPAC name 3-Hydroxybutanal
Other names Acetaldol 3-Hydroxybutyraldehyde beta-Hydroxybutyraldehyde β-Hydroxybutyraldehyde
Identifiers
CAS Number	107-89-1 (R/S)^Y 117706-97-5 (R)^Y 117706-98-6 (S)^Y
3D model (JSmol)	Interactive image
ChemSpider	7609 (R/S)^Y 18915429 (R)^Y
ECHA InfoCard	100.003.210
EC Number	203-530-2
MeSH	3-hydroxybutanal
PubChem CID	7897 (R/S) 13061653 (R)
UNII	8C6G962B53^N
CompTox Dashboard (EPA)	DTXSID2050407
InChI InChI=1S/C4H8O2/c1-4(6)2-3-5/h3-4,6H,2H2,1H3^Y Key: HSJKGGMUJITCBW-UHFFFAOYSA-N^Y InChI=1/C4H8O2/c1-4(6)2-3-5/h3-4,6H,2H2,1H3 Key: HSJKGGMUJITCBW-UHFFFAOYAI
SMILES CC(O)CC=O
Properties
Chemical formula	C₄H₈O₂
Molar mass	88.106 g·mol⁻¹
Appearance	colorless liquid
Density	0.98 g/mL
Boiling point	162 °C (324 °F; 435 K)
Related compounds
Related aldehydes	Glycolaldehyde Lactaldehyde
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). N verify (what is ^YN ?) Infobox references