Product Name

  • Name

    Nitrotetrazolium blue chloride

  • EINECS 206-067-4
  • CAS No. 298-83-9
  • Density 1.5521 (rough estimate)
  • Solubility methanol: 50 mg/mL, clear, very strongly yellow
  • Melting Point 200 °C
  • Formula C40H30N10O6.2Cl
  • Boiling Point
  • Molecular Weight 817.648
  • Flash Point
  • Transport Information
  • Appearance yellow crystals
  • Safety 36-45-36/37-26
  • Risk Codes 22-68/20/21/22-20/21/22-36-36/37/38
  • Molecular Structure Molecular Structure of 298-83-9 (Nitrotetrazolium blue chloride)
  • Hazard Symbols HarmfulXn,IrritantXi
  • Synonyms 2H-Tetrazolium,2,2'-(3,3'-dimethoxy[1,1'-biphenyl]-4,4'-diyl)bis[3-(4-nitrophenyl)-5-phenyl-,dichloride (9CI);Tetrazolium,3,3'-(3,3'-dimethoxy-4,4'-biphenylylene)bis[2-(p-nitrophenyl)-5-phenyl-2H-chloride](6CI);2,2'-Bis(p-nitrophenyl)-5,5'-diphenyl-3,3'-(3,3'-dimethoxy-4,4'-diphenylene)ditetrazoliumchloride;2,2'-Dinitrophenyl-5,5'-diphenyl-3,3'-dimethoxy-4,4'-diphenylene)ditetrazoliumchloride;3,3'-(3,3'-Dimethoxy-4,4'-diphenylene)bis[2-(p-nitrophenyl)-5-phenyltetrazoliumchloride];Nitro BT;Nitro Blue Tetrazolium chloride;Nitro Tetrazolium BT;Nitrotetrazolium blue;Tetrazolium nitro blue;p-Nitro blue tetrazolium;
  • PSA 179.28000
  • LogP 1.29040

Nitrotetrazolium blue chloride Chemical Properties


IUPAC Name: 2-[2-methoxy-4-[3-methoxy-4-[3-(4-nitrophenyl)-5-phenyltetrazol-2-ium-2-yl]phenyl]phenyl]-3-(4-nitrophenyl)-5-phenyltetrazol-2-ium dichloride
Molecular Formula: C40H30Cl2N10O6
Molecular Weight: 817.64 g/mol
EINECS: 206-067-4
Product Categories: Organics; Tetrazolium Salts; Tetrazolium Salts & Formazans
Classification Code: Indicators and reagents; Mutation data
Melting Point: 200 °C
storage temp.: 2-8 °C
solubility: methanol: 50 mg/mL, clear, very strongly yellow
Stability of NBT (CAS NO.298-83-9): Stable, but store cold.

Nitrotetrazolium blue chloride Uses

  NBT (CAS NO.298-83-9) is used in immunology for sensitive detection of alkaline phosphatase.

Nitrotetrazolium blue chloride Toxicity Data With Reference

Organism Test Type Route Reported Dose (Normalized Dose) Effect Source
mouse LD50 oral 2gm/kg (2000mg/kg)   Gekkan Yakuji. Pharmaceuticals Monthly. Vol. 32, Pg. 614, 1990.

Nitrotetrazolium blue chloride Consensus Reports

It is reported in EPA TSCA Inventory.

Nitrotetrazolium blue chloride Safety Profile

Hazard Codes:  XnHarmful,XiIrritant
Risk Statements:  22-68/20/21/22-20/21/22-36-36/37/38 
R20:Harmful by inhalation. 
R68:Possible risk of irreversible effects. 
R20/21/22:Harmful by inhalation, in contact with skin and if swallowed. 
R36:Irritating to eyes. 
R36/37/38:Irritating to eyes, respiratory system and skin.
Safety Statements:  36-45-36/37-26 
S36:Wear suitable protective clothing. 
S45:In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) 
S36/37:Wear suitable protective clothing and gloves. 
S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.
WGK Germany:  3
RTECS:  XF8045000
F:  8-10-23
HS Code:  32041900
Moderately toxic by ingestion. When heated to decomposition it emits toxic vapors of NOx and Cl.

Nitrotetrazolium blue chloride Specification

  NBT (CAS NO.298-83-9), its Synonyms are Nitroblue tetrazolium ; Nitro BT ; Nitro Blue tetrazolium ; Nitro Blue tetrazolium chloride ; Nitro Blue tetrazolium salt ; Nitro tetrazolium BT ; Nitroblue tetrazolium salt ; Nitrotetrazolium Blue ; Nitrotetrazolium Chloride Blue ; Tetrazolium Nitro Blue ; Tetrazolium nitro BT ; p-Nitro Blue tetrazolium ; p-Nitro Blue tetrazolium chloride ; p-Nitrotetrazolium Blue ; 2H-Tetrazolium, 2,2'-(3,3'-dimethoxy(1,1'-biphenyl)-4,4'-diyl)bis(3-(4-nitrophenyl)-5-phenyl-, chloride (1:2) ; 2H-Tetrazolium, 2,2'-(3,3'-dimethoxy(1,1'-biphenyl)-4,4'-diyl)bis(3-(4-nitrophenyl)-5-phenyl-, dichloride ; 2H-Tetrazolium, 3,3'-(3,3'-dimethoxy(1,1'-biphenyl)-4,4'-diyl)bis(2-(4-nitrophenyl)-5-phenyl-, dichloride ; 2H-Tetrazolium, 3,3'-(3,3'-dimethoxy(1,1'-biphenyl)-4,4'-diyl)bis(2-(4-nitrophenyl)-5-phenyl-,dichloride ; 5,5'-Diphenyl-3,3'-bis(4-nitrophenyl)-2,2'-(3,3'-dimethoxybiphenyl-4,4'-ylene)ditetrazolium dichloride . It is yellow crystals.

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