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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HCID 10708Generated: October 25, 2026

Trimellitic acid

TRIMELLITIC ACID · BENZENE-1,2,4-TRICARBOXYLIC ACID · rimelliticaci · TriMellitic aci · Trimellitic Acid >4-carboxyphthalicacid · 1,2,4-Tricarboxybenzene · BENZENETRICARBOXYLICACID · Benzol-1,2,4-tricarbonsure

https://huagongshe.com/en/chemical/10708

Trimellitic acid molecular structure

Identifiers & Physical Properties

CAS No.528-44-9
Molecular formulaC9H6O6
Average molar mass210.14 g/mol
Monoisotopic mass210.01643791 g/mol
SMILESO=C(O)c1ccc(C(=O)O)c(C(=O)O)c1
InChIKeyARCGXLSVLAOJQL-UHFFFAOYSA-N
PubChem CID10708
ChEMBLCHEMBL296024
ChEBICHEBI:166055
EC No.208-432-3
DTXSIDDTXSID3021487

Chemical & Physical Properties

XLogP0.3
Topological polar surface area112
Hydrogen bond donors3
Hydrogen bond acceptors6
Rotatable bonds3
Heavy atoms15
Formal charge0
Complexity297
Melting point229-231 °C (dec.) (lit.)
Boiling point309.65°C (rough estimate)
Density1.4844 (rough estimate)
Refractive index1.6630 (estimate)
Storage conditionsSealed in dry,Room Temperature
Solubility2.1g/l2.1 G/100 ML (25 ºC)
Physical stateCrystalline Powder
pKa (acidity coefficient)pK1: 2.52pK2: 3.84pK3: 5.20 (25°C)
ColorWhite
Merck14,9702
BRN2214815
InChI1S/C9H6O6/c10-7(11)4-1-2-5(8(12)13)6(3-4)9(14)15/h1-3H,(H,10,11)(H,12,13)(H,14,15)
InChIKeyARCGXLSVLAOJQL-UHFFFAOYSA-N
SMILESOC(C1=C(C(O)=O)C=C(C(O)=O)C=C1)=O
LogP (partition coefficient)1.240 (est)
Indirect Additives used in Food Contact SubstancesTRIMELLITIC ACID
CAS DataBase Reference528-44-9(CAS DataBase Reference)
FDA 21 CFR175.300175.320177.1390177.2420
EWG's Food Scores1
FDA UNII7NVY29MQ5F
NIST Chemistry Reference1,2,4-Benzenetricarboxylic acid(528-44-9)
EPA Substance Registry System1,2,4-Benzenetricarboxylic acid (528-44-9)
UNSPSC Code12352100
NACRESNA.22
GHS pictogramGHS07
Signal wordWarning
GHS hazard statementsH315-H319-H335
GHS precautionary statementsP261-P264-P271-P280-P302+P352-P305+P351+P338
Target organsRespiratory system
Personal protective equipment (PPE)dust mask type N95 (US), Eyeshields, Gloves
Hazard symbolsXi
Risk statements (R)36/37/38
Safety statements (S)26-36-37/39
Water hazard class (WGK)2
RTECS numberDC1980000
Hazard NoteIrritant
TSCA inventory statusTSCA listed
Customs code29173990
Storage class11 - Combustible Solids
Hazard classEye Irrit. 2Skin Irrit. 2STOT SE 3

Safety & Regulations

Personal protective equipment (PPE)dust mask type N95 (US), Eyeshields, Gloves
Water hazard class (WGK)2
TSCA inventory statusTSCA listed
RTECS numberDC1980000
Customs code29173990
Risk statements (R)36/37/38
Signal wordWarning
GHS pictogramGHS07
Hazard symbolsXi
hazard_noteIrritant
Safety statements (S)26-36-37/39
Storage class11 - Combustible Solids
Target organsRespiratory system
GHS hazard statementsH315-H319-H335
Hazard classEye Irrit. 2Skin Irrit. 2STOT SE 3
GHS precautionary statementsP261-P264-P271-P280-P302+P352-P305+P351+P338

Applications & Uses

Uses

1,2,4-Benzenetricarboxylic acid (trimellitic acid) is generally used as carboxylate ligand in the synthesis of a wide range of metal-organic frameworks (MOFs). It can also be used to synthesize Ln3+ encapsulated nanocrystals which exhibit white-light luminescence.

Uses

Intermediate in the preparation of resins, plasticizers, dyes, inks, adhesives.