Basic information Overview Names & identifiers Properties Safety & regulation Chemistry & industry Related reactions Compound notes
Basic information Standard SMILES C/C(=C/C(=O)O)C(=O)OInChIKey HNEGQIOMVPPMNR-IHWYPQMZSA-N
Molecular formula C5H6O4
Average molar mass 130.1 g/mol
Monoisotopic mass 130.02660867
Overview Citraconic acid is a dicarboxylic acid consisting of maleic acid having a methyl substituent at the 2-position. It has a role as a human metabolite. It is a dicarboxylic fatty acid and a dicarboxylic acid. It is functionally related to a maleic acid. It is a conjugate acid of a citraconate(2-).
Names & identifiers
Preferred name Citraconic acid
IUPAC (Z)-2-methylbut-2-enedioic acid
English name Citraconic acid
Molecular formula C5H6O4
Molecular weight 130.1 Names & synonyms Citraconic acid 2-methylmaleic acid 498-23-7 METHYLMALEIC ACID cis-Methylbutenedioic acid Citraconsaeure (Z)-2-Methyl-2-butenedioic acid (2Z)-2-methylbut-2-enedioic acid (Z)-2-methylbut-2-enedioic acid Methyl-maleinsaeure alpha-methylmaleic acid 0RQ6CXO9KD
Show more names Citraconic 2-METHYL-2-BUTENEDIOIC ACID Citracoinc acid methyl-maleicaci Citraconicacid,98+% kyselinacitrakonova
cis-2-methylbutenedioic acid 2-methyl-2Z-butenedioic acid 2-butenedioic acid, 2-methyl-, (2Z)- CHEBI:17626 DTXSID601019903 NSC-32949 RefChem:577445 DTXCID40909104
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Database identifiers
PubChem CID 643798
DTXSID DTXSID601019903
ChEBI CHEBI:17626
UNII 0RQ6CXO9KD
EC Number 207-858-7
Properties Computed structural properties
XLogP -0.1
Topological polar surface area 74.6 Ų
Hydrogen bond donors 2
Hydrogen bond acceptors 4
Rotatable bonds 2
Heavy atoms 9
Formal charge 0
Complexity 168 Show all 8 Show all 8 / 8 Experimental & physicochemical properties Drugs Pharmaceuticals -> Listed in ZINC15
Lipids Fatty Acyls [FA] -> Fatty Acids and Conjugates [FA01] -> Dicarboxylic acids [FA0117]
SpringerMaterials Properties Diamagnetic susceptibility
Solubility 783.0 mg/mL
Melting Point 88 - 94 °C
Physical Description Solid
Collision Cross Section · 2 items 118.2 Ų [M-H]- [CCS Type: DT; Method: single field calibrated with ESI Low Concentration Tuning Mix (Agilent)]
118.6 Ų [M-H]-
Show all 7 Show all 7 / 7 Physicochemical properties
Melting point 88 · 88-94 °C (lit.)
Boiling point 160.75 °C · 160.75°C (rough estimate)
Safety & regulation Safety information is for reference only and does not replace the supplier’s Safety Data Sheet (SDS), applicable regulations, or professional assessment.
GHS classification GHS Classification · 4 items Warning
H302 (100%): Harmful if swallowed [Warning Acute toxicity, oral]
P264, P270, P301+P317, P330, and P501 (click each P-code to see the statement)
Aggregated GHS information provided per 88 reports by companies from 2 notifications to the ECHA C&L Inventory.
Hazard information Regulatory Information Chemical: 2-Butenedioic acid, 2-methyl-, (Z)-
Other Safety Information Evaluation - Chemicals not considered for in depth evaluation - Not commercially active in Australia
Hazard Classes and Categories Acute Tox. 4 (100%)
Safety data
PPE dust mask type N95 (US), Eyeshields, Gloves
wgk 3
rtecs GE6650000
ridadr 2811
hs_code 29171900
Toxicity LD50 in rats, mice (mg/kg): 1320, 2260 orally (Jenner)
risk_code 22-36/37/38
Signal word Warning
Symbol(GHS) GHS07,GHS06
hazard_code Xn
safety_code 36-37/39-26
hazard_class 6.1(b)
Storage Class
Chemistry & industry Pharmacology MeSH Pharmacological Classification Drugs used to treat or prevent skin disorders or for the routine care of skin.
Cellular Locations Extracellular
Applications Uses Citraconic acid is used in synthetic or copolymer oils, in treating metals for adhesion of polyolefins, and in thermoplastics.
Uses Citraconic acid is an important raw material and intermediate used in organic synthesis, pharmaceuticals, agrochemicals and dyestuff fields.
Upstream & downstream products Additional notes · 1 item Definition ChEBI: Citraconic acid is a dicarboxylic acid consisting of maleic acid having a methyl substituent at the 2-position. It has a role as a human metabolite. It is a dicarboxylic acid and a dicarboxylic fatty acid. It is functionally related to a maleic acid. It is a conjugate acid of a citraconate(2-).
Related reactions 11 records
All As reactant As product As reagent As catalyst As solvent
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Density
1 · 1,62 g/cm3
refractive index 1.4502 · 1.4502 (estimate)
storage temp. -20 °C · Hygroscopic, -20°C Freezer, Under inert atmosphere
solubility DMSO (Sparingly, Sonicated), Water (Slightly)
pka 1 · pK1:2.29(0);pK2:6.15(+1) (25°C)
color White to light beige
Water Solubility FREELY SOLUBLE
Henry's Law Constant 3.6 · 3.6×107 mol/(m3Pa) at 25℃, Yaws (2003)
InChI 1S/C5H6O4/c1-3(5(8)9)2-4(6)7/h2H,1H3,(H,6,7)(H,8,9)/b3-2-
InChIKey HNEGQIOMVPPMNR-IHWYPQMZSA-N
SMILES C\C(=C\C(O)=O)C(O)=O
CAS DataBase Reference 498 · 498-23-7(CAS DataBase Reference)
FDA UNII 0 RQ6CXO9KD · 0RQ6CXO9KD
NIST Chemistry Reference 2 · 2-Butenedioic acid, 2-methyl-, (Z)-(498-23-7)
UNSPSC Code 12352100 · 12352100
Symbol(GHS) 7 · GHS07,GHS06
Hazard statements 301 · H301-H302
Precautionary statements 264 · P264-P270-P301+P312+P330-P501-P301+P310a-P321-P405-P501a
PPE 95 · dust mask type N95 (US), Eyeshields, Gloves
Risk Statements 22 · 22-36/37/38
Safety Statements 36 · 36-37/39-26
HS Code 29171900 · 29171900
Storage Class 11 · 11 - Combustible Solids
Hazard Classifications 4 Oral · Acute Tox. 4 Oral
Toxicity 50 in · LD50 in rats, mice (mg/kg): 1320, 2260 orally (Jenner) Show all 41 Show all 41 / 41
11 - Combustible Solids
Hazard statements H301-H302
Hazard Classifications Acute Tox. 4 Oral
Precautionary statements P264-P270-P301+P312+P330-P501-P301+P310a-P321-P405-P501a Show all 17 Show all 17 / 17