Other grades of this product :
| Calconcarboxylic acid Basic information |
| Product Name: | Calconcarboxylic acid | | Synonyms: | 2-Hydroxy[(2-hydroxy-4-sulpho-1-naphthalene)azo]naphthalene-3-carboxylicacid;2-naphthalenecarboxylicacid,3-hydroxy-4-[(2-hydroxy-4-sulfo-1-naphthalenyl)az;3-HYDROXY-4-(2-HYDROXY-4-SULFO-1-NAPHTHYLAZO)-2-NAPHTHALENECARBOXYLIC ACID;3-HYDROXY-4-(2-HYDROXY-4-SULFO-1-NAPHTHYLAZO)NAPHTHALENE-2-CARBOXYLIC ACID;2-HYDROXY-1-(2'-HYDROXY-4'-SULFO-1'-NAPHTHYLAZO)-3-NAPHTHOIC ACID;2-HYDROXY-1-(2-HYDROXY-4-SULFO-1-NAPHTHYLAZO)-3-NAPHTHOIC ACID;2-HYDROXY-1-(2-HYDROXY-4-SULFO-1-NAPHTHYLAZO)-NAPHTHALENE-3-CARBOXYLIC ACID;2-HYDROXY-1-(2-HYDROXY-4-SULPHO-1-NAPHTHYLAZO)-3-NAPHTHOIC ACID | | CAS: | 3737-95-9 | | MF: | C21H14N2O7S | | MW: | 438.41 | | EINECS: | 223-117-0 | | Product Categories: | Analytical Chemistry;Azo Compounds;Chelating Reagents;Naphthylazo Compounds | | Mol File: | 3737-95-9.mol |
| Calconcarboxylic acid Chemical Properties |
| Hazard Codes | Xi | | Risk Statements | 36/37/38 | | Safety Statements | 26-36-37/39 | | WGK Germany | 3 | | TSCA | Yes | | HS Code | 29270000 |
| Calconcarboxylic acid Usage And Synthesis |
| Chemical Properties | dark violet powder | | Uses | Calconcarboxylic acid is used as an indicator for calcium titrations with ethylenediaminetetraacetic acid (EDTA) in the presence of magnesium. | | Purification Methods | Purify it via its p-toluidinium salt, viz: dissolve the dye in warm 20% aqueous MeOH, treat with an equivalent of p-toluidine and cool to precipitate the salt. Finally recrystallise the acid from hot water. [Itoh & Ueno Analyst (London) 95 583 1970.] It is an indicator and complexes with Ca2+ in presence of Mg2+ and other metal ions [Patton & Reeder Anal Chem 28 1026 1956, Prentoe & Prentoe Analyst 106 227 1981]. |
| Calconcarboxylic acid Preparation Products And Raw materials |
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