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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Calconcarboxylic acid Suppliers

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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%