Customization: | Available |
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CAS No.: | 3737-95-9 |
Formula: | C21h14n2o7s |
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Hunan Yunbang Pharmaceutical Co., Ltd. (Yunbangpharm) located in Changsha High-tech Industrial Park, Hunan. It is a high-tech enterprise specializing in the research and development, production and sales of Pharmaceutical raw materials, Pharmaceutical intermediates(API) and Fine chemicals. Based in China, Yunbangpharm has been providing suitable solutions for many domestic,foreign pharmaceutical companies and traders. Excellent quality, good reputation and authentic price have won the praise of the majority of customers.
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A: Most products provide free samples, but the shipping cost be paid by customers.
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A: First of all, our quality control will reduce the quality problem to near zero. If there is a real quality problem caused by us, we will send you free goods for replacement or refund your loss.
1. 90days quality guarantee for exchange.
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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 |
Melting point | 300 °C(lit.) |
density | 1.60±0.1 g/cm3(Predicted) |
pka | -0.50±0.40(Predicted) |
form | Powder |
color | Very dark purple to black |
Odor | Odorless |
Water Solubility | slightly soluble |
BRN | 727492 |
Stability: | Stable. Incompatible with strong oxidizing agents. |
CAS DataBase Reference | 3737-95-9(CAS DataBase Reference) |
EPA Substance Registry System | 2-Naphthalenecarboxylic acid, 3-hydroxy-4-[(2-hydroxy-4-sulfo-1-naphthalenyl)azo]- (3737-95-9) |
Safety Information |
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-tolui-dine 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]. |