Iminodiacetic acid

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| Watchedfields = changed

| verifiedrevid = 408567508

| ImageFile = Iminodiacetic acid.svg

| ImageFile_Ref = {{chemboximage|correct|??}}

| ImageSize = 160

| ImageName = Skeletal formula of iminodiacetic acid

| PIN = 2,2′-Azanediyldiacetic acid

| OtherNames = 2-(Carboxymethylamino)acetic acid
Diglycolamidic acid

|Section1={{Chembox Identifiers

| CASNo = 142-73-4

| CASNo_Ref = {{cascite|correct|CAS}}

| UNII_Ref = {{fdacite|correct|FDA}}

| UNII = XQM2L81M8Z

| PubChem = 8897

| ChemSpiderID = 8557

| ChemSpiderID_Ref = {{chemspidercite|correct|chemspider}}

| EINECS = 205-555-4

| KEGG = C19911

| KEGG_Ref = {{keggcite|changed|kegg}}

| MeSHName = imnodiacetic+acid

| ChEBI = 24786

| ChEBI_Ref = {{ebicite|changed|EBI}}

| ChEMBL = 461164

| ChEMBL_Ref = {{ebicite|correct|EBI}}

| RTECS = AI2975000

| Beilstein = 878499

| SMILES = OC(=O)CNCC(O)=O

| StdInChI = 1S/C4H7NO4/c6-3(7)1-5-2-4(8)9/h5H,1-2H2,(H,6,7)(H,8,9)

| StdInChI_Ref = {{stdinchicite|correct|chemspider}}

| StdInChIKey = NBZBKCUXIYYUSX-UHFFFAOYSA-N

| StdInChIKey_Ref = {{stdinchicite|correct|chemspider}}

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|Section2={{Chembox Properties

| C=4 | H=7 | N=1 | O=4

| Appearance = Colourless crystals

| Density = 1.436 g mL⁻¹

| LogP = 1.84

| pKa = 1.873

| pKb = 12.124

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|Section3={{Chembox Thermochemistry

| DeltaHf = −933.9–−931.3 kJ mol⁻¹

| DeltaHc = −1.6430–−1.6406 MJ mol⁻¹

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|Section4={{Chembox Hazards

| GHSPictograms = {{gHS exclamation mark}}

| GHSSignalWord = WARNING

| HPhrases = {{h-phrases|315|319|335}}

| PPhrases = {{p-phrases|261|305+351+338}}

| FlashPtC = 178

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|Section5={{Chembox Related

| OtherFunction_label = alkanoic acids

| OtherFunction = {{unbulleted list|Acetylcysteine|Glycylglycine|Nitrilotriacetic acid|N-Oxalylglycine|Tiopronin|Bucillamine|Oxalyldiaminopropionic acid}}

| OtherCompounds = N-Acetylglycinamide

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Iminodiacetic acid is the organic compound with the formula HN(CH₂CO₂H)₂, often abbreviated to IDA. A white solid, the compound is a dicarboxylic acid amine (the nitrogen atom forms a secondary amino group, not an imino group as the name suggests). IDA is a popular chelating ligand, first introduced in the early 1950s by Schwarzenbach.{{cite journal |last=Schwarzenbach |first=G |year=1952 |title=Der Chelateffekt |journal=Helv. Chim. Acta|volume=35|pages=2344–2359|doi=10.1002/hlca.19520350721 |issue=7}}