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A3003412

Congo red , 0.1% , 573-58-0

Synonym(s):
Congo Red;Direct Red 28;Direct Red R;Direct Red Y;3,3?-[(1,1?-Biphenyl)-4,4?-diylbis(azo)]bis(4-amino-1-naphthalenesulfonic Acid) 2Na

CAS NO.:573-58-0

Empirical Formula: C32H22N6Na2O6S2

Molecular Weight: 696.66

MDL number: MFCD00004028

EINECS: 209-358-4

Pack Size Price Stock Quantity
500ML RMB183.20 In Stock
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Update time: 2022-07-08

PRODUCT Properties

Melting point: >360 °C (lit.)
Density  0.995 g/mL at 25 °C
vapor pressure  <1 Pa
storage temp.  Store at +5°C to +30°C.
solubility  H2O: soluble10mg/mL
form  Powder/Solid
Colour Index  22120
pka 4.1(at 25℃)
color  Red Brown
PH Range 3(blue)-5.2(red)
Odor Odorless
PH 6.7 (10g/l, H2O, 20℃)
Water Solubility  soluble
λmax 497nm, 488nm, 595nm
Merck  14,2498
BRN  3894858
Stability: Stable. Incompatible with strong oxidizing agents.
Biological Applications Detecting bacteria,protein folding disorders; treating dermatological disorders,neurodegenerative diseases,Alzheimer’s disease
Major Application Waveguides, optical sensors, display devices, inks, fertilizer, pesticides, carbohydrates, treatment of pathogen infections, age-related macular degeneration
CAS DataBase Reference 573-58-0(CAS DataBase Reference)
EPA Substance Registry System Congo Red (573-58-0)

Description and Uses

C.I. Direct red 28(Congo Red) is an odorless,brownish-red powder. Molecular weight =698.72. Meltingpoint =359℃. Soluble in water; solubility =25 g/L at25℃.

Dye, medicine (diagnostic aid), indicator, biological stain.

Safety

Symbol(GHS) 
GHS08
Signal word  Danger
Hazard statements  H350-H361d
Precautionary statements  P201-P202-P280-P308+P313-P405-P501
Hazard Codes  T,Xi
Risk Statements  45-63-36
Safety Statements  53-45-37/39-26
WGK Germany  3
RTECS  QK1400000
TSCA  Yes
HS Code  29215900
Hazardous Substances Data 573-58-0(Hazardous Substances Data)
Toxicity LD50 i.v. in rats: 190 mg/kg (Richardson, Dillon)

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