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Phenol sulfonphthalein PSP red powder CAS143-74-8 Phenol Red for biochemical research

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Port: Qingdao, Shanghai
Payment Terms: L/C,T/T,Western Union,MoneyGram
Supply Ability: 5000 Kilogram/Kilograms per Month Phenol Red
Other Names: Phenol Red
Molecular Weight: 354.38
Place of Origin: China
Refractive index: 1.5300 (estimate)
Boiling point: >300°C
Purity: 99%min.
Model Number: 143-74-8
Density: 1.445 Mg m-3
Appearance: Red powder
CAS No.: 143-74-8
Brand Name: Baovi
Type: Pharmaceutical Intermediates
Product name: Phenol sulfonphthalein PSP red powder CAS143-74-8 Phenol Red
Water Solubility: 0.77 g/L
EINECS No.: 205-609-7
MF: C19H14O5S
Flash point: >300°C
Melting point: 300 °C
Application: Pharmaceutical Intermediates
Packaging Detail: 1kg/bag, 25kg/fiber drum For Phenol sulfonphthalein PSP red powder CAS143-74-8 Phenol Red for biochemical research
Shandong Baovi Energy Technology Co., Ltd.
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Phenol sulfonphthalein PSP red powder CAS143-74-8 Phenol Red for biochemical research


Product Description


Product Name:Phenol Red
Melting point 300 °C
Boiling point >300°C
density 1.445 Mg m-3
refractive index 1.5300 (estimate)
Fp >300°C
storage temp. Store at RT.
solubility 1 M NaOH: soluble1mg/mL
form Solid
pka7.9(at 25℃)
color Red
PH Range6.6(YELLOW)-8.0(RED)
Water Solubility 0.77 g/L








PH transition interval

 1.2(orange)---3.0(yellow) 6.5 ( brownish yellow ) ---8.0(purplish red)

 1.2(orange)---3.0(yellow) 6.5 ( brownish yellow ) ---8.0(purplish red)




λ2(PH 3.0)



λ3(PH 6.5)



λ4(PH 8.0)



 α1 (λ1,PH1.2,dry sample)



 α2 (λ2,PH 3.0,dry sample)



 α3(λ3,PH 6.5,dry sample)



α4 (λ4,PH 8.0,dry sample)



Solubility in alkali



Loss on drying ≤



ignition residue≤






Application Fields

Phenol Red/Phenolrde is used as fluorescence analysis of sulfur ions, test bromide, titration of chlorine, bromine and iodine. Adsorption indicator, redox indicator.

Packaging & Shipping

Packing: 1kg/bag, 25kg/fiber drum

Port: Qingdao, Shanghai

Delivery time: Around 7-10 working days


Our Advantages


Company Information

Shandong Baovi Energy Technology Co., LTD. (the Company), located in Jinan City, Shandong Province, was founded in 2003, and it is a raw material supplier for the global organic chemical industry.The Company also participates in the production of small quantity of high value-added chemicals and intermediates.

Our products include solvents, antifreeze, preservatives, pigment, chemicals intermediates, etc., widely used in agriculture, medicine, food sanitation and other fields.






A, Do you supply FREE sample?

FREE sample is ok, but the sample delivery fee is on your side.

B, What's your payment term?

1, T/T, 30% prepaid, the balance 70% will be paid when the products are ready!

2, L/C

3, D/P


C, What's your delivery time?

Generally it is 3-7 working days after receiving your deposit.

D, How long have you been involved in this chemical field?

Since 2003. So we enjoy much experience, can take care your cargo very well!


E, Can you supply relative document?

Of course, we can supply MSDS, COA, CO, commerical invoice, packing list, B/L...

If your markets have any special requirements, pls just let me know freely! 


G, Do you accept third party inspecition?

Yes, we do!


We are service on 24 hours, any other questions, pls ask me freely!



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