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Phenol Red CAS 143-74-8

Phenol Red, also known as Phenol Red, is a deep red crystalline powder, molecular weight 354.38, CAS No. 143- 74-8, soluble in water, alcohol, acetone, almost insoluble in ether and chloroform.It is soluble in alkali hydroxide or carbonic acid alkali solution with deep red colour, stable in air, and can be used as identification medium for microbial culture, acid-base indicator, blood carbon dioxide measurement, and indicator for the preparation of disaccharide-iron urea medium for bacterial serological test.
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Phenol Red Basic information
Product Name: Phenol Red
CAS: 143-74-8
MF: C19H14O5S
MW: 354.38
EINECS: 205-609-7
Mol File: 143-74-8.mol
Phenol Red Chemical Properties
Melting point >300 °C
Boiling point >300°C
bulk density 200-300kg/m3
density 1.445 Mg m-3
refractive index 1.5300 (estimate)
Fp >300°C
storage temp. no restrictions.
solubility 1 M NaOH: soluble1mg/mL
pka 7.9(at 25℃)
form Solid
color Red
Odor Odorless
PH 6.8~8.4
PH Range 6.6(YELLOW)-8.0(RED)
Water Solubility 0.77 g/L
ε(extinction coefficient) ≥10000 at 288-294nm in H2O
≥55000 at 555-561nm in H2O
≥7000 at 357-363nm in H2O
λmax 557nm, 558nm, 360nm, 423nm, 433nm
Merck 147,247
BRN 326470
Major Application Display device, sol-gel matrix, photoreceptors, fuel cells, waveguides, paints, detergents, cosmetics, antiperspirant composition, diapers, screening bacteria, detecting viable cells, diagnosis of urogenital ureaplasmosis, treatment of pathogen infections, amyloid-associated diseases, glaucoma, pulmonary hypertension, asthma, chronic obstructive pulmonary disease, erectile dysfunction, Raynaud’s syndrome, heparin overdose, vulvodynia, wound healing, psychoactive drugs, evaluating dental caries activity
InChIKey BELBBZDIHDAJOR-UHFFFAOYSA-N
LogP 3.02
CAS DataBase Reference 143-74-8(CAS DataBase Reference)
EPA Substance Registry System Phenol Red (143-74-8)

Name (content and impurity

content %)

index

result

PH color change domain

1.2 (orange)-3.0 (yellow)

6.5 (brown)-8.0 (purple)

1.2 (orange)-3.0 (yellow)

6.5 (brown)-8.0 (purple)

Maximum absorption

wavelength (nm)



λ1 (PH1.2)

503-506

503

λ2 (PH3.0)

430-435

435

λ3 (PH6.5)

430-435

430

λ4 (PH8.0)

557-560

558

Mass Absorption Index (L/cm

g)



α1 (λ1, PH1.2, dry sample)

110-123

112.5

α2 (λ2, PH3.0, dry sample)

60-68

63.2

α3 (λ3, PH6.5, dry sample)

62-72

65.5

α4 (λ4, PH8.0, dry sample)

115-130

115.0

Alkali dissolution test

qualified

qualified

loss on drying

1.0

0.5

Ignition residue (as sulfate)

0.2

0.2

通用固体

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