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Congo Red

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Identification
Molecular formula
C32H22N6Na3O6S3
CAS number
573-58-0
IUPAC name
trisodium;5-amino-3-[4-[4-[(7-amino-1-hydroxy-3-sulfonato-2-naphthyl)azo]phenyl]phenyl]azo-4-hydroxy-naphthalene-2,7-disulfonate
State
State

Congo Red is typically a solid at room temperature. It is usually made available as a dry powder.

Melting point (Celsius)
360.00
Melting point (Kelvin)
633.15
Boiling point (Celsius)
0.00
Boiling point (Kelvin)
0.00
General information
Molecular weight
696.67g/mol
Molar mass
696.6650g/mol
Density
1.0000g/cm3
Appearence

Congo Red appears as a brownish-red powder.

Comment on solubility

Solubility of Trisodium 5-amino-3-[4-[4-[(7-amino-1-hydroxy-3-sulfonato-2-naphthyl)azo]phenyl]phenyl]azo-4-hydroxy-naphthalene-2,7-disulfonate

Trisodium 5-amino-3-[4-[4-[(7-amino-1-hydroxy-3-sulfonato-2-naphthyl)azo]phenyl]phenyl]azo-4-hydroxy-naphthalene-2,7-disulfonate, often referred to for its complex structure, exhibits notable solubility characteristics that are crucial for various applications. Understanding its solubility can be enhanced by considering several key points:

  • Water Solubility: This compound is typically soluble in water due to its multiple sulfonate groups (-SO₃⁻), which increase its ionic nature and allow for strong interactions with water molecules.
  • pH Dependence: The solubility can vary with pH levels; generally, neutral to basic conditions may enhance solubility owing to reduced protonation of sulfonic acid groups.
  • Temperature Effects: An increase in temperature can also contribute to higher solubility, as solubility often increases with temperature for many ionic compounds.
  • Complex Formation: Its ability to form complexes with certain metals or ions can also affect its solubility profile.

In summary, the solubility of this compound can be regarded as influenced heavily by its ionic characteristics, environmental conditions, and potential interactions with other substances. As the saying goes, "Like dissolves like," and in the case of trisodium 5-amino-3-[4-[4-[(7-amino-1-hydroxy-3-sulfonato-2-naphthyl)azo]phenyl]phenyl]azo-4-hydroxy-naphthalene-2,7-disulfonate, its structure favors solubility in polar solvents, particularly in aqueous environments.

Interesting facts

Interesting Facts about Trisodium 5-amino-3-[4-[4-[(7-amino-1-hydroxy-3-sulfonato-2-naphthyl)azo]phenyl]phenyl]azo-4-hydroxy-naphthalene-2,7-disulfonate

Trisodium 5-amino-3-[4-[4-[(7-amino-1-hydroxy-3-sulfonato-2-naphthyl)azo]phenyl]phenyl]azo-4-hydroxy-naphthalene-2,7-disulfonate, often referred to in shorter terms such as Tanshinone or its related nomenclature, is a remarkable chemical compound predominantly employed in the field of dye chemistry. Here are some fascinating aspects of this compound:

  • Vibrant Applications: This compound is best known for its use in textiles, plastics, and inks due to its intense color properties, particularly its deep shades of red.
  • Chemical Structure: The compound features multiple functional groups, including amino and sulfonato groups, which enhance its reactivity and solubility in aqueous solutions, making it a versatile agent in various chemical reactions.
  • Biological Interest: Recent studies have indicated potential applications in biomedical fields, including the development of sensors and drug delivery systems, due to its unique molecular properties.
  • Historical Significance: The azo dye family, to which this compound belongs, has a rich history dating back to the mid-19th century when the first synthetic dyes were created, revolutionizing the textile industry.
  • Environmental Considerations: As with many azo dyes, there is ongoing research into the environmental impact of their production and degradation, highlighting the importance of sustainable practices in chemical manufacturing.

In summary, this compound represents a fascinating intersection of chemistry, biology, and sustainability, making it a subject of continuous research and innovation.

Synonyms
2429-73-4
C.I. Direct Blue 2
DIRECT BLUE 2
Chlorazol Black BH
Bencidal Navy Blue BH
Diazo Black BH
Navy Blue EHBL
Diazophenyl Black BH
Brasilazol Black BG
Melantherine BH
Indoxine KL
Diazine Black H
Melantherine BHX
Pheno Navy Blue
Pontamine Deep Blue BH
Azocard Blue BH
Diazol Black BH
Direct Black BH
Fixanol Blue BH
Diazo Black CR
Azomine Black BH
Diamine Black BH
Phenazo Black BH
Altazine Black BH
Benzanil Black BH
Blue BH
Diazo Black BHSW
Navy Blue EMBL
Neklamin Black BH
Paramine Black BH
Diamine Black BHM
Diazine Black BHC
Diazine Black HDW
Diazine Black HNJ
Direct Diazo Black
Japanol Black BHK
Calcomine Diazo Black BHD
Diacotton Black BH
Airedale Black BHD
Brasilazol Black BH
Chloramine Black BH
Diazo Black BHSWK
Dianil Dark Blue H
Diaphtamine Black BH
Diazo Navy Blue BH
Amanil Developed Black BHSW
Fenamin Navy Blue H
Benzo Black Blue BH
Diazo Black BHN-CF
Diazo Fast Black BH
Direct Dark Blue BH
Direct Navy Blue BH
Tertrodirect Black BH
Diazo Direct Black N
Direct Diazo Black C
Direct Diazo Black N
Direct Diazo Black S
Cutamin Dark Blue CB
Direct Blue Black BH
Zambesi Dark Blue BH
Aizen Direct Black BH
Benzo Black Blue FBH
Diazo Fast Black MBH
Tertrodirect Black BHS
Vondacel Dark Blue BH
Azine Diazo Black BHK
Kayaku Direct Black BH
Mitsui Direct Black BH
Eniazol Blue Black BHN
CCRIS 6236
Atul Developed Black BT
Belamine Diazo Black BH
Chrome Leather Black BH
Chrome Leather Black DS
Diphenyl Blue Black GHS
Diphenyl Blue Black MBH
Symulon Direct Black BH
C.I. Direct Blue 2 (VAN)
CI 22590
Union Fast Navy Blue DS
HSDB 4219
Calcoloid Diazo Black BHL
Chlorazol Leather Black BH
Diaminogene Velour Black B
NCI-C61110
Calcomine Diazo Black BTCW
CI Direct Blue 2, trisodium salt
Pontamine Diazo Black BHSW
C.I. 22590
Pontamine Diazo Black BHid and BH
EINECS 219-384-8
NSC 75779
Chrome Leather Dark Blue BHM
CI DIRECT BLUE 2
DTXSID6025191
C.I. DIRECT BLUE 2 [HSDB]
2,7-Naphthalenedisulfonic acid, 5-amino-3-((4'-((7-amino-1-hydroxy-3-sulfo-2-naphthalenyl)azo)(1,1'-biphenyl)-4-yl)azo)-4-hydroxy-, trisodium salt
Trisodium 5-amino-3-((4'-((7-amino-1-hydroxy-3-sulphonato-2-naphthyl)azo)(1,1'-biphenyl)-4-yl)azo)-4-hydroxynaphthalene-2,7-disulphonate
NSC-75779
2,7-Naphthalenedisulfonic acid, 5-amino-3-((4'-((7-amino-1-hydroxy-3-sulfo-2-naphthalenyl)azo)(1,1'-biphenyl)-4-hydroxy-, trisodium salt
2,7-Naphthalenedisulfonic acid, 5-amino-3-(2-(4'-(2-(7-amino-1-hydroxy-3-sulfo-2-naphthalenyl)diazenyl)(1,1'-biphenyl)-4-yl)diazenyl)-4-hydroxy-, sodium salt (1:3)
Trisodium 5-amino-3-[[4'-[(7-amino-1-hydroxy-3-sulphonato-2-naphthyl)azo][1,1'-biphenyl]-4-yl]azo]-4-hydroxynaphthalene-2,7-disulphonate
2,7-Naphthalenedisulfonic acid, 5-amino-3-[[4'-[(7-amino-1-hydroxy-3-sulfo-2-naphthalenyl)azo][1,1'-biphenyl]-4-yl]azo]-4-hydroxy-, trisodium salt
2,7-Naphthalenedisulfonic acid, 5-amino-3-[2-[4'-[2-(7-amino-1-hydroxy-3-sulfo-2-naphthalenyl)diazenyl][1,1'-biphenyl]-4-yl]diazenyl]-4-hydroxy-, sodium salt (1:3)
Diazo Black BHNCF
DIAMINE BLACK
DIAZO BLACK
DIAZO FAST BLACK
ORBAMIN BLACK BH
TERTRODIRECT BLACK
DIPHENYL BLUE BLACK
CHROME LEATHER BLACK
CALCOMINE DIAZO BLACK
CHROME LEATHER DARK BLUE
DTXCID901474154
2,7Naphthalenedisulfonic acid, 5amino3((4'((7amino1hydroxy3sulfo2naphthalenyl)azo)(1,1'biphenyl)4hydroxy, trisodium salt
219-384-8
Diazo Black BHN
Chrome Leather Black CR
CHLORAZOLBLACKBH
EE5HVP9RA8
C.I. Direct Blue 2, trisodium salt
Direct Blue 2 (Technical Grade)
sodium 5-amino-3-((E)-(4'-((E)-(7-amino-1-hydroxy-3-sulfonatonaphthalen-2-yl)diazenyl)-[1,1'-biphenyl]-4-yl)diazenyl)-4-hydroxynaphthalene-2,7-disulfonate
TriNa 5-amino-3-4'-(7-amino-1-OH-3-sulphonato-2-naphthyl)azo1,1'-biphenyl-4-ylazo-4-OHnaphthalene-2,7-disulphonate
Chloroazol Black BH
MFCD00059132
UNII-EE5HVP9RA8
AKOS004901487
AKOS024421048
NS00047371
Q27277129
TRISODIUM 5-AMINO-3-((4'-((7-AMINO-1-HYDROXY-3-SULPHONATO-2- NAPHTHYL)AZO)(1,1'-BIPHENYL)-4-YL)AZO)-4-HYDROXYNAPHTHALENE- 2,7-DISULPHONATE
trisodium;5-amino-3-[[4-[4-[(7-amino-1-hydroxy-3-sulfonatonaphthalen-2-yl)diazenyl]phenyl]phenyl]diazenyl]-4-hydroxynaphthalene-2,7-disulfonate