szerin

Serine
Skeletal formula Skeletal formula of L-serine	Serine at physiological pH L-serine zwitterion
Ball-and-stick model	Space-filling model
Names
	IUPAC name Serine
	Systematic IUPAC name 2-Amino-3-hydroxypropanoic acid
Identifiers
CAS Number	L: 56-45-1 ; D/L: 302-84-1 ; D: 312-84-5 ;
3D model (JSmol)	L: Interactive image; D/L Zwitterion: Interactive image;
ChEBI	L: CHEBI:17115 ;
ChEMBL	L: ChEMBL11298 ;
ChemSpider	L: 5736 ; D/L: 597 ; D: 64231 ;
DrugBank	L: DB00133 ;
EC Number	L: 206-130-6;
IUPHAR/BPS	L: 726;
KEGG	L: C00065; D: C00740;
PubChem CID	L: 5951; D/L: 617; D: 71077;
UNII	L: 452VLY9402 ; D/L: 00PAR1C66F ; D: 1K77H2Z9B1 ;
	InChI InChI=1S/C3H7NO3/c4-2(1-5)3(6)7/h2,5H,1,4H2,(H,6,7)/t2-/m0/s1 Key: MTCFGRXMJLQNBG-REOHCLBHSA-N ; D/L: Key: MTCFGRXMJLQNBG-UHFFFAOYSA-N; D: Key: MTCFGRXMJLQNBG-UWTATZPHSA-N;
	SMILES L: C([C@@H](C(=O)O)N)O; D/L Zwitterion: C([C@@H](C(=O)[O-])[NH3+])O;
Properties
Chemical formula	C3H7NO3
Molar mass	105.093 g·mol−1
Appearance	white crystals or powder
Density	1.603 g/cm3 (22 °C)
Melting point	246 °C (475 °F; 519 K) decomposes
Solubility in water	soluble
Acidity (pKa)	2.21 (carboxyl), 9.15 (amino)
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references