Clearsynth is a leading innovator in pharmaceutical reference standards, offering high-quality Reference Standards for Phthalic Acid, including both pharmacopeial and non-pharmacopeial impurities, metabolites, stable isotope products, and nitrosamines (N-NO products). Our Phthalic Acid impurity reference standards are invaluable for pharmaceutical research, supporting product development, ANDA and DMF submissions, quality control (QC), method validation, and stability studies. They also aid in identifying unknown impurities and assessing genotoxic potential.
Our Phthalic Acid-related products undergo thorough characterization and are supplied with detailed Certificates of Analysis (COA) and analytical data that meet regulatory requirements. All supplied products are re-tested at regular intervals to ensure ongoing quality and compliance.
Our Phthalic Acid-related products undergo thorough characterization and are supplied with detailed Certificates of Analysis (COA) and analytical data that meet regulatory requirements. All supplied products are re-tested at regular intervals to ensure ongoing quality and compliance.
Phthalic Acid Related Compounds
Stable Isotopes
| COMPOUND | CATEGORY | CAT. No. | CAS. No. | STOCK STATUS |
|---|---|---|---|---|
| "Phthalic Acid Bis(3,7-dimethyloctyl) Ester-d4" | Stable Isotopes | CS-T-84050 | 1398065-81-0 | Enquire |
| 1-Methylcyclohexylphthalic Acid Ester-d4 | Stable Isotopes | CS-T-98038 | Not Available | Enquire |
| Phthalic Acid (Phenyl-13C6, D4) | Stable Isotopes | CS-T-97913 | 88-99-3 (Unlabelled) | Enquire |
| Phthalic Acid 1-(1,2-dimethylpropyl) Ester-d4 | Stable Isotopes | CS-T-97911 | Not Available | Enquire |
| Phthalic Acid Anhydride-13C2 | Stable Isotopes | CS-T-84307 | 1239918-30-9 | Enquire |
| Phthalic Acid Bis(1,2-dimethylpropyl) Ester-d4 | Stable Isotopes | CS-T-97909 | Not Available | Enquire |
| Phthalic Acid Cyclohexyl Isobutyl Ester-d4 | Stable Isotopes | CS-T-97908 | Not Available | Enquire |
| Phthalic Acid-13C2 | Stable Isotopes | CS-T-84166 | 254110-94-6 | Enquire |
| Phthalic Acid-d4 1-Ethylpropyl Ester | Stable Isotopes | CS-T-97910 | Not Available | Enquire |
| Terephthalic Acid-13C8 | Stable Isotopes | CS-T-87075 | 1794767-08-0 | Enquire |
| Tetrabromophthalic Acid-13C6 | Stable Isotopes | CS-T-97889 | Not Available | Enquire |
API Standards
| COMPOUND | CATEGORY | CAT. No. | CAS. No. | STOCK STATUS |
|---|---|---|---|---|
| Terephthalic Acid | API Standards | CS-T-43341 | 100-21-0 | In Stock |
Impurities
| COMPOUND | CATEGORY | CAT. No. | CAS. No. | STOCK STATUS |
|---|---|---|---|---|
| 2,6-Dichloroterephthalic Acid | Impurities | CS-T-17797 | 116802-97-2 | Enquire |
| 3-(hydroxyamino)phthalic acid | Impurities | CS-O-39597 | 202262-76-8 | Enquire |
| 3-Methoxyphthalic Acid | Impurities | CS-T-32840 | 14963-97-4 | Enquire |
| 3-Nitrophthalic Acid | Impurities | CS-T-59602 | 603-11-2 | In Stock |
| 4-Acetoxyisophthalic Acid | Impurities | CS-T-01224 | 5985-26-2 | Enquire |
| 4-Chloroisophthalic acid | Impurities | CS-M-26632 | 2845-85-4 | Enquire |
| 5-Methoxyisophthalic Acid | Impurities | CS-T-29821 | 46331-50-4 | In Stock |
| Hexahydrophthalic acid | Impurities | CS-T-95908 | 1687-30-5 | Enquire |
| Phthalic Acid 4,5-cis-Dihydrodiol | Impurities | CS-T-84762 | 130073-64-2 | Enquire |
| Phthalic Acid Cyclohexyl Isobutyl Ester | Impurities | CS-T-60555 | Not Available | Enquire |
| Polyvinyl acetate phthalate | Impurities | CS-P-08662 | 34481-48-6 | Enquire |
| Terephthalic acid monoamide | Impurities | CS-M-07499 | 6051-43-0 | Enquire |
| Tetrachlorophthalic acid | Impurities | CS-DL-00969 | 632-58-6 | Enquire |
Intermediates
| COMPOUND | CATEGORY | CAT. No. | CAS. No. | STOCK STATUS |
|---|---|---|---|---|
| "2,5-Dibromoterephthalic acid" | Intermediates | CS-DV-01314 | 13731-82-3 | Enquire |
| "2,5-Dimethylterephthalic acid" | Intermediates | CS-AC-08197 | 6051-66-7 | Enquire |
| "3,6-Dichlorophthalic acid" | Intermediates | CS-BO-00014 | 16110-99-9 | Enquire |
| "4-(2,5-Dioxo-2,5-dihydropyrrol-1-yl)phthalic acid" | Intermediates | CS-AC-08729 | 56896-91-4 | Enquire |
| "4,5-epoxytetrahydrophthalic acid diglycidylester" | Intermediates | CS-CF-00004 | 25293-64-5 | Enquire |
| "5-(2-Chloroacetamido)-2,4,6-triiodo-isophthalic Acid" | Intermediates | CS-T-11034 | 4873-45-4 | Enquire |
| "Phthalic Acid 1-(1,2-dimethylpropyl) Ester" | Intermediates | CS-T-39873 | 198284-10-5 | Enquire |
| α-propargylhomoterephthalic acid dimethyl ester | Intermediates | CS-CS-00021 | 146464-90-6 | Enquire |
| 1-Methylcyclohexylphthalic Acid Ester | Intermediates | CS-T-58067 | 960-24-7 | Enquire |
| 2-(1H-pyrrol-1-yl)terephthalic acid | Intermediates | CS-ED-30331 | 1040713-41-4 | Enquire |
| 2-(1H-tetrazol-1-yl)terephthalic acid | Intermediates | CS-ED-30332 | 1010915-67-9 | Enquire |
| 2,5-Diaminoterephthalic acid | Intermediates | CS-ED-26138 | 945-30-2 | Enquire |
| 2,5-Dianilinoterephthalic acid | Intermediates | CS-CD-00046 | 10109-95-2 | Enquire |
| 2-Amino-5-iodoisophthalic acid | Intermediates | CS-ED-35417 | 907574-30-5 | Enquire |
| 2-Aminoterephthalic acid | Intermediates | CS-EL-04545 | 10312-55-7 | Enquire |
| 2-Bromo-5-chloroterephthalic acid | Intermediates | CS-ED-14999 | 500550-60-7 | Enquire |
| 2-Bromo-5-fluoro-3,6-dimethylterephthalic acid | Intermediates | CS-ED-14972 | 1555757-16-8 | Enquire |
| 2-Bromoterephthalic acid | Intermediates | CS-AC-07136 | 586-35-6 | Enquire |
| 2-fluoro-isophthalic acid | Intermediates | CS-DV-01719 | 1583-65-9 | Enquire |
| 2-Hydroxyterephthalic acid | Intermediates | CS-M-57568 | 636-94-2 | Enquire |
| 2-Hydroxy-terephthalic acid dimethyl ester | Intermediates | CS-M-43566 | 6342-72-9 | Enquire |
| 2-methoxy-isophthalic acid | Intermediates | CS-DV-01776 | 1951-38-8 | Enquire |
| 2-Nitroisophthalic acid | Intermediates | CS-M-42555 | 21161-11-5 | Enquire |
| 2-Nitroisophthalic Acid Monomethyl Ester | Intermediates | CS-DJ-00744 | 861593-27-3 | Enquire |
| 3,4,6-Trichlorophthalic Acid | Intermediates | CS-T-86503 | 62268-16-0 | Enquire |
| 3,4-dichlorophthalic Acid | Intermediates | CS-O-41127 | 56962-06-2 | Enquire |
| 3,6-DIFLUOROPHTHALIC ACID | Intermediates | CS-BO-00004 | 651-97-8 | Enquire |
| 3-Aminophthalic acid hydrochloride | Intermediates | CS-BX-00460 | 6946-22-1 | In Stock |
| 3-Aminophthalic Acid Hydrochloride Dihydrate | Intermediates | CS-ED-08160 | 1852533-96-0 | In Stock |
| 3-Bromophthalic acid | Intermediates | CS-AC-07577 | 116-69-8 | Enquire |
| 4-(4-Fluorobenzoyl)isophthalic Acid | Intermediates | CS-T-23917 | 1645-24-5 | Enquire |
| 4-Aminophthalic acid | Intermediates | CS-EL-07997 | 5434-21-9 | Enquire |
| 4-Boronophthalic acid | Intermediates | CS-AC-06503 | 1072946-35-0 | Enquire |
| 4-Bromoisophthalic acid | Intermediates | CS-AC-07855 | 6939-93-1 | Enquire |
| 4-Bromophthalic acid | Intermediates | CS-M-57654 | 6968-28-1 | Enquire |
| 4-Chlorophthalic acid | Intermediates | CS-T-72727 | 89-20-3 | Enquire |
| 4-Methoxyphthalic acid | Intermediates | CS-M-55854 | 1885-13-8 | Enquire |
| 4-Nitroisophthalic acid | Intermediates | CS-M-42556 | 4315-09-7 | Enquire |
| 5-(1H-pyrrol-1-yl)isophthalic acid | Intermediates | CS-ED-30333 | 944894-38-6 | Enquire |
| 5-(2-Aminoacetamido)-2,4,6-triiodo-isophthalic Acid | Intermediates | CS-T-01851 | 4873-46-5 | Enquire |
| 5-Aminoisophthalic Acid Monomethyl Ester | Intermediates | CS-T-65698 | 28179-47-7 | Enquire |
| 5-Bromo-4-chloroisophthalic Acid | Intermediates | CS-T-68436 | 191227-53-9 | Enquire |
| 5-Bromoisophthalic acid | Intermediates | CS-T-67155 | 23351-91-9 | Enquire |
| 5-Fluoroisophthalic acid | Intermediates | CS-O-49763 | 1583-66-0 | Enquire |
| 5-Formyl-isophthalic acid monomethyl ester | Intermediates | CS-DU-00107 | 914220-93-2 | Enquire |
| 5-Hydrazinoisophthalic acid hydrochloride | Intermediates | CS-ED-40735 | 873773-66-1 | Enquire |
| 5-Hydroxyisophthalic acid | Intermediates | CS-M-57723 | 618-83-7 | Enquire |
| 5-Methylisophthalic acid | Intermediates | CS-M-58374 | 499-49-0 | Enquire |
| Isophthalic Acid pure | Intermediates | CS-EP-00273 | 121-91-5 | In Stock |
| Phthalic Acid | Intermediates | CS-T-39867 | 88-99-3 | In Stock |
| Phthalic Acid 1-Ethylpropyl Ester | Intermediates | CS-T-39878 | 106477-98-9 | Enquire |
| Phthalic Acid 8-Methylnonyl Ester | Intermediates | CS-T-39875 | 69725-01-5 | Enquire |
| Phthalic Acid Mono-tetrahydrogeranyl Ester | Intermediates | CS-T-84472 | 297182-84-4 | Enquire |
| Terephthalic Acid Mono(2-bromoethyl) Ester | Intermediates | CS-T-43345 | 173550-97-5 | Enquire |
| Tetrabromophthalic Acid | Intermediates | CS-T-43492 | 13810-83-8 | Enquire |
| Tetrafluorophthalic acid | Intermediates | CS-M-02832 | 652-03-9 | Enquire |
| tetrahydrophthalic acid diglycidylester | Intermediates | CS-CF-00003 | 21544-03-6 | Enquire |
Fine Chemicals
| COMPOUND | CATEGORY | CAT. No. | CAS. No. | STOCK STATUS |
|---|---|---|---|---|
| 2-Aminoisophthalic acid | Fine Chemicals | CS-M-03247 | 39622-79-2 | Enquire |
| 2-Chloroisophthalic acid | Fine Chemicals | CS-MM-55939 | 13049-16-6 | Enquire |
| 3-Fluorophthalic acid | Fine Chemicals | CS-M-01762 | 1583-67-1 | Enquire |
| 4,5-Dichlorophthalic acid | Fine Chemicals | CS-BX-00770 | 56962-08-4 | Enquire |
| 4,5-Difluorophthalic acid | Fine Chemicals | CS-MM-26870 | 18959-31-4 | Enquire |
| 4-Nitrophthalic Acid | Fine Chemicals | CS-T-37128 | 610-27-5 | In Stock |
| Terephthalic acid, cyclic ethylene oxydiethylene ester | Fine Chemicals | CS-O-58760 | 29278-57-7 | Enquire |
Building Blocks
| COMPOUND | CATEGORY | CAT. No. | CAS. No. | STOCK STATUS |
|---|---|---|---|---|
| 3-Chlorophthalic acid | Building Blocks | CS-ZG-95036 | 27563-65-1 | Enquire |
| 4-Hydroxyphthalic acid | Building Blocks | CS-M-58419 | 610-35-5 | In Stock |
| 4-Methylphthalic Acid | Building Blocks | CS-O-52618 | 4316-23-8 | Enquire |
| 4-Phenoxyphthalic acid | Building Blocks | CS-ED-01236 | 37951-15-8 | Enquire |
| 5-Chloroisophthalic Acid | Building Blocks | CS-T-93985 | 2157-39-3 | Enquire |
Pesticide Standards
| COMPOUND | CATEGORY | CAT. No. | CAS. No. | STOCK STATUS |
|---|---|---|---|---|
| 2,3,5,6-Tetrachloroterephthalic Acid | Pesticide Standards | CS-T-87274 | 2136-79-0 | Enquire |