- Calconcarboxylic acid
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- $1.00 / 1KG
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2019-07-14
- CAS:3737-95-9
- Min. Order: 1KG
- Purity: 99%
- Supply Ability: 25kg
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| | Calconcarboxylic acid Basic information |
| Product Name: | Calconcarboxylic acid | | Synonyms: | 3-Hydroxy-4-(2-hydroxy-4-sulfo-1-naphthylazo)naphthalene-2-carboxylic acid, indicator grade, pure;Calcon-carboxylic Acid
Cal Red;3-Hydroxy-4-(2-hydroxy-4-sulfo-1-naphthylazo)naphthalene-2-carboxylic acid, pure, indicator grade;CALCONCARBOXYLIC ACID METAL INDICATOR;LABOTEST-BB LT00454622;(E)-3-hydroxy-4-((2-hydroxy-4-sulfonaphthalen-1-yl)diazenyl)-2-naphthoic acid;Calconcarboxylic acid, indicator;3-HYDROXY-4(2-HYDROXY-4-SULFO-1-NAPHTYLAZO)NAPHTHALENE-2-CARBOXYLIC ACID INDICATOR | | 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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