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

MSDS

• Language:English Provider:SigmaAldrich
• Language:English Provider:ACROS
• Language:English Provider:ALFA

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(3737-95-9)Related Product Information

• Glycolic acid
• CHLOROPHOSPHONAZO III
• Hydroxyapatite
• Naphthalene
• 2,2'-Azobis(2-methylpropionitrile)
• 2,5-PYRIDINEDICARBOXYLIC ACID
• Quinolinic acid
• Hydroxy silicone oil
• Cyclohexanecarboxylic acid
• Ethyl 2-(Chlorosulfonyl)acetate
• Mordant Black 17
• Citric acid
• Glycine
• Folic acid
• 4-Hydroxybenzaldehyde
• Ascoric Acid
• Camptothecin Series--10-hydroxycamptothecin
• 2-Naphthaldehyde