ChemicalBook > CAS DataBase List > Calconcarboxylic acid

Calconcarboxylic acid

Product Name
Calconcarboxylic acid
CAS No.
3737-95-9
Chemical Name
Calconcarboxylic acid
Synonyms
HHSNN;HHSNNA;Kalces;CAL RED;CAL-RED(R);NN【Dotite】;NN Solution;medium: solid;Calcium carboxylate;Calconcarboxylic aci
CBNumber
CB9270734
Molecular Formula
C21H14N2O7S
Formula Weight
438.41
MOL File
3737-95-9.mol
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Calconcarboxylic acid Property

Melting point:
300 °C(lit.)
Density 
1.60±0.1 g/cm3(Predicted)
bulk density
400kg/m3
storage temp. 
room temp
solubility 
1 M NaOH: 10mg/mL
form 
Powder
pka
-0.50±0.40(Predicted)
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)
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Safety

Hazard Codes 
Xi
Risk Statements 
36/37/38
Safety Statements 
26-36-37/39
WGK Germany 
3
TSCA 
Yes
HS Code 
29270000
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Hazard and Precautionary Statements (GHS)

Symbol(GHS)
Signal word
Warning
Hazard statements

H315Causes skin irritation

H319Causes serious eye irritation

H335May cause respiratory irritation

Precautionary statements

P261Avoid breathing dust/fume/gas/mist/vapours/spray.

P264Wash hands thoroughly after handling.

P264Wash skin thouroughly after handling.

P271Use only outdoors or in a well-ventilated area.

P280Wear protective gloves/protective clothing/eye protection/face protection.

P302+P352IF ON SKIN: wash with plenty of soap and water.

P305+P351+P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

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N-Bromosuccinimide Price

Sigma-Aldrich
Product number
H3128
Product name
Calconcarboxylic acid
Packaging
5g
Price
$49.9
Updated
2025/07/31
Sigma-Aldrich
Product number
H3128
Product name
Calconcarboxylic acid
Packaging
25g
Price
$159
Updated
2025/07/31
Sigma-Aldrich
Product number
1.04595
Product name
Calconcarboxylic acid
Purity
metal indicator
Packaging
5G
Price
$340
Updated
2025/07/31
Sigma-Aldrich
Product number
1.04595
Product name
Calconcarboxylic acid
Purity
metal indicator
Packaging
25G
Price
$851
Updated
2025/07/31
TCI Chemical
Product number
H0250
Product name
2-Hydroxy-1-(2-hydroxy-4-sulfo-1-naphthylazo)-3-naphthoic Acid (1:100 diluted with K2SO4)
Packaging
1g
Price
$36
Updated
2025/07/31
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Calconcarboxylic acid Chemical Properties,Usage,Production

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

Raw materials

Preparation Products

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View Lastest Price from Calconcarboxylic acid manufacturers

Shaanxi Dideu Medichem Co. Ltd
Product
Calconcarboxylic acid 3737-95-9
Price
US $1.00/KG
Min. Order
1KG
Purity
99%
Supply Ability
20t
Release date
2024-07-14
Career Henan Chemical Co
Product
Calconcarboxylic acid 3737-95-9
Price
US $1.00/KG
Min. Order
1KG
Purity
99%
Supply Ability
25kg
Release date
2019-07-12

3737-95-9, Calconcarboxylic acidRelated Search:

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  • 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
  • HHSNN
  • HHSNNA
  • CALCONCARBOXYLIC ACID
  • CAL RED
  • CAL-RED(R)
  • Kalces
  • Patton and Reeder’s reage
  • 2,2-dihydroxy-4-sulpho-1,1-azonaphthalene-3-carboxylic acid
  • 2-hydroxy-1(2-hydroxy-4-sulfo-1-*naphthylazo)3-na
  • 3-Hydroxy-4-(2-hydroxy-4-sulpho-1-naphthylazo)-2-naphthalenecarboxylic acid~Patton and Reeders
  • CALCONCARBOXYLIC ACID, INDICATOR FOR COM PLEXOMETRY
  • 2-HYDROXY-1(2-HYDROXY-4-SULFO-1-*NAPHTHY LAZO)3-NAPH
  • 3-HYDROXY-4(2-HYDROXY-4-SULFO-1-NAPHTHYL-AZO)-2-NAPHTHALENECARBOXYLIC ACID IND.
  • CalconCarboxylicAcidGr
  • Patton&Reeder`SReagentGr
  • PATTON AND REEDER’S REAGENT GR (CALCON CARBOXYLIXC ACID)
  • CALCONCARBOXYLIC ACID, REAG.
  • 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
  • 3-Hydroxy-4-(2-hydroxy-4-sulfo-1-naphthylazo)naphthalene-2-carboxylic acid, indicator grade, pure 10GR
  • 2-Benzoyl-3-phenylacrylic acid
  • Calconcarboxylic Acid, For complexometry
  • 2-Naphthalenecarboxylicacid,3-hydroxy-4-[(2-hydroxy-4-sulfo-1-naphthalenyl)azo]-
  • 3-hydroxy-4-[(2-hydroxy-4-sulfo-1-naphthalenyl)azo]-2-Naphthalenecarboxylicacid
  • PATTON AND REEDER INDICATOR
  • PATTON AND REEDER'S INDICATOR
  • PATTON AND REEDERS REAGENT
  • PATTON AND REEDER'S REAGENT
  • 3-HYDROXY-4-(2-HYDROXY-4-SULFO-1-NAPHTHYLAZO)-2-5-QUINOLINESULFONIC ACID
  • 2-Hydroxy-1-(2-hydroxy-4-sulfo-1-naphthylazo)-3-naphthoic Acid (1:100 diluted with K2SO4)
  • 2-HYDROXY-1-(2-HYDROXY-4-SULFO-1-NAPTHYLAZO)-3-NAPTHOIC ACID
  • 3-HYDROXY-4-(2-HYDROXY-4-SULFO-1-NAPTHALAZO)-2-5-QUINOLINESULFONIC ACID
  • CALCONCARBOXYLIC ACID extrapure AR
  • 2-Hydroxy-1-(2-hydroxy-4-sulfo-1-naphthylazo)-3-naphthoic acid, Cal-Red(R), Patton and Reeders reagent, 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, Cal-Red(R), Calconcarboxylic acid, Patton and Reeders reagent
  • 3-Hydroxy-4-(2-hydroxy-4-sulfo-1-naphthylazo)naphthalene-2-carboxylic acid, indicato
  • PattonAndReederReagentGr-(2-Hydroxy-1-(2-Hydroxy-4-Sulpho-1-Naphthylazo3-NaphthoicAcid,CalconcarboxylicAcid,CalRed)
  • PattonAndReederReagentGr
  • 2,2'-Dihydroxy-4'-sulfo[1,1'-azobisnaphthalene]-3-carboxylic acid
  • 2-Hydroxy-1-(2-hydroxy-4-sulfo-1-naphtylazo)-3-naphthoic acid
  • 2-Hydroxy-1-[(2-hydroxy-4-sulfo-1-naphtyl)azo]-3-naphthalenecarboxylic acid
  • 3-Hydroxy-4-[(2-hydroxy-4-sulfo-1-naphtyl)azo]naphthalene-2-carboxylic acid
  • NN【Dotite】
  • Calconcarboxylic acid, 94% (dry wt.), water <10%