• Name

  Phenol Red sodium salt

• EINECS 252-057-8
• CAS No. 34487-61-1
• Density 0.972 g/cm³
• Solubility Soluble in water
• Melting Point 285 °C (dec.)(lit.)
• Formula C₁₉H₁₃NaO₅S
• Boiling Point 562.8oC at 760mmHg
• Molecular Weight 376.365
• Flash Point 294.2oC
• Transport Information
• Appearance red liquid or red/brown crystals
• Safety 26-36-37/39-45-36/37/39-27
• Risk Codes 36/37/38-34
• Molecular Structure
• Hazard Symbols Xi, C
• Synonyms 2-[(4-hydroxyphenyl)-(4-oxo-1-cyclohexa-2,5-dienylidene)methyl]benzenesulfonate;Phenol,4,4'-(1,1-dioxido-3H-2,1-benzoxathiol- 3-ylidene)bis-,monosodium salt;Sodium hydrogen 4,4-(3H-2,1-benzoxathiol-3-ylidene)bisphenolate S,S-dioxide;Phenolsulfonephthalein sodium;Phenol red sodium;
• PSA 95.04000
• LogP 4.62760

Synthetic route

34487-61-1

phenolsulphophthaleine sodium salt

172464-36-7

2-(4,4'-dihydroxy-benzhydryl)-benzenesulfonic acid

Conditions

Conditions	Yield
With hydrogenchloride; sodium tetrahydroborate In ethanol at 25℃; for 48h;

34487-61-1

phenolsulphophthaleine sodium salt

115481-73-7

Bis(phenol) phenyl sulfonate

Conditions

Conditions	Yield
Multi-step reaction with 5 steps 1: 1.) NaBH4, 2.) 5percent HCl / aq. ethanol / 48 h / 25 °C 2: 72 percent / 1.) RT, 4h, 2.) CH2Cl2, 1 h 3: PCl5 / 3 h / 60 - 65 °C / 0.1 Torr 4: 92 percent / Et3N / CH2Cl2 / 12 h / 25 °C 5: 93 percent / HCl conc. / methanol / 20 h / Ambient temperature View Scheme

34487-61-1

phenolsulphophthaleine sodium salt

115511-92-7

bis(4.acetoxyphenyl)<2-(phenoxysulfonyl)phenyl>methane

Conditions

Conditions	Yield
Multi-step reaction with 4 steps 1: 1.) NaBH4, 2.) 5percent HCl / aq. ethanol / 48 h / 25 °C 2: 72 percent / 1.) RT, 4h, 2.) CH2Cl2, 1 h 3: PCl5 / 3 h / 60 - 65 °C / 0.1 Torr 4: 92 percent / Et3N / CH2Cl2 / 12 h / 25 °C View Scheme

34487-61-1

phenolsulphophthaleine sodium salt

147510-56-3

Acetic acid 4-[(4-acetoxy-phenyl)-(2-chlorosulfonyl-phenyl)-methyl]-phenyl ester

Conditions

Conditions	Yield
Multi-step reaction with 3 steps 1: 1.) NaBH4, 2.) 5percent HCl / aq. ethanol / 48 h / 25 °C 2: 72 percent / 1.) RT, 4h, 2.) CH2Cl2, 1 h 3: PCl5 / 3 h / 60 - 65 °C / 0.1 Torr View Scheme

34487-61-1

phenolsulphophthaleine sodium salt

115481-75-9

pyridinium 2-benzenesulfonate

Conditions

Conditions	Yield
Multi-step reaction with 2 steps 1: 1.) NaBH4, 2.) 5percent HCl / aq. ethanol / 48 h / 25 °C 2: 72 percent / 1.) RT, 4h, 2.) CH2Cl2, 1 h View Scheme

65201-92-5

2-[2-[4-(dimethylamino)phenyl]ethenyl]-1-ethylquinolinium chloride

34487-61-1

phenolsulphophthaleine sodium salt

QR+*PR-

Conditions

Conditions	Yield
In water

2768-90-3

quinaldine blue

34487-61-1

phenolsulphophthaleine sodium salt

PNC+*PR-

Conditions

Conditions	Yield
In water

34487-61-1

phenolsulphophthaleine sodium salt

62625-28-9

3',3'',5',5''-tetrabromophenolsulphonephthalein sodium salt

Conditions

Conditions	Yield
With Agrocybe aegerita heme-thiolate peroxygenase; dihydrogen peroxide; sodium bromide at 20℃; pH=5; Reagent/catalyst; Enzymatic reaction;

Phenol red sodium salt Specification