Phel red indicator , 0.5%（w/v）inwater , 143-74-8

Synonym(s):
Phenol red;Phenolsulfonphthalein;Phenolsulfonphthalein solution

Update time: 2022-07-08

Melting point:	>300 °C
Boiling point:	>300°C
Density	1.445 Mg m-3
refractive index	1.5300 (estimate)
Flash point:	>300°C
storage temp.	no restrictions.
solubility	1 M NaOH: soluble1mg/mL
form	Solid
pka	7.9(at 25℃)
color	Red
PH Range	6.6(YELLOW)-8.0(RED)
Odor	Odorless
PH	6.8～8.4
Water Solubility	0.77 g/L
λmax	557nm, 558nm, 360nm, 423nm, 433nm
Merck	14,7247
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	3.020

Phenol red belongs to the class of triphenylmethane dyes and is widely used in the textile industry.

As indicator in 0.02-0.05% alcohol solution. pH 6.8 yellow, 8.4 red.