7-Aminocephalosporanic acid

Names
IUPAC name 3-[(Acetyloxy)methyl]-7β-amino-3,4-didehydrocepham-4-carboxylic acid
Systematic IUPAC name (6R,7R)-3-[(Acetyloxy)methyl]-7-amino-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid
Other names 7-Aminocephalosporinic acid
Identifiers
CAS Number	957-68-6 Y
3D model (JSmol)	Interactive image
3DMet	B02205
Abbreviations	7-ACA
Beilstein Reference	622637, 8919572
ChEBI	CHEBI:2255 Y
ChEMBL	ChEMBL1161449 Y
ChemSpider	390087 Y
ECHA InfoCard	100.012.259
EC Number	213-485-0
KEGG	C07756 Y
MeSH	7-Aminocephalosporanic+acid
PubChem CID	483168
UNII	9XI67897RG Y
CompTox Dashboard (EPA)	DTXSID9045342
InChI InChI=1S/C10H12N2O5S/c1-4(13)17-2-5-3-18-9-6(11)8(14)12(9)7(5)10(15)16/h6,9H,2-3,11H2,1H3,(H,15,16)/t6-,9-/m1/s1 Y Key: HSHGZXNAXBPPDL-HZGVNTEJSA-N Y
SMILES O=C2N1/C(=C(\CS[C@@H]1[C@@H]2N)COC(=O)C)C(=O)O
Properties
Chemical formula	C10H12N2O5S
Molar mass	272.27 g·mol−1
Melting point	300 °C (572 °F; 573 K)[1]
log P	-1.87
Acidity (pKa)	2.59
Basicity (pKb)	11.41
Hazards
GHS labelling:
Pictograms
Signal word	Danger
Hazard statements	H317, H334
Precautionary statements	P261, P280, P342+P311
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

7-ACA (7-aminocephalosporanic acid) is the core chemical structure (a synthon) for the synthesis of cephalosporin antibiotics and intermediates. It can be obtained by chemoenzymatic hydrolysis of cephalosporin C.^[2][3]