Phenol Red Phenolsulfonephthalein CAS No. 143-74-8

• Customization: Available
• CAS No.: 143-74-8
• Formula: C19h14o5s
• Model NO.: km-306
• EINECS: 205-609-7
• Classification: Indicators and Test Papers
• Grade: AR
• Specific Usage: For Biological Purpose
• Content: Standard
• Usage: Laboratory Reagents, Analytical Reagents
• Source: Organic Synthesis
• Habit Appellation: Chemical Indicaton
• Application: Industry, Scientific Research, Health, Environmental Protection, Agriculture
• Property: Biochemical Reagent
• Solution Test in Alkali: Qualified
• Loss on Drying: 1.0%Max
• Residue on Ignition (as Sulfate): 0.2%Max
• Melting Point: >300′c
• Refractive Index: 1.5300
• Density: 1.445
• Boiling Point: >300′c
• Transport Package: 25kg/Fibre Drum
• Trademark: KMW
• Origin: China
• HS Code: 3204901000
• Production Capacity: 2mt/Month

Product Description

Code:km-306
Product name:Phenol Red
CAS No. 143-74-8
MF:  C₁₉H₁₄O₅S
MW: 354.38
PH indicator range: 
1.2 (orange) -3.0(yellow)
6.5(yellow-brown)- 8.0(purple)
Maximum absorption wave-length(nm):
λ₁(PH1.2)  503---506
λ₂(PH 3.0)  430---435
λ₃(PH 6.5)  430---435
λ₄(PH 8.0)  557---560
Mass absorption coefficient(L/cm·g)
α₁ (λ₁,PH 1.2,dry sample)110---123
α₂ (λ₂,PH 3.0,dry sample)60---68
α₃ (λ₃,PH 6.5,dry sample)62---72
α₄ (λ₄,PH 8.0,dry sample)115-130
Solution test in alkali: qualified
Loss on drying: 1.0%max
Residue on ignition (as sulfate): 0.2%max'

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