TPPS
Metal Indicator
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Product codeT003 TPPS
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CAS No.35218-75-8(anhydrous)
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Chemical name5,10,15,20-Tetraphenyl-21H,23H-porphinetetrasulfonic acid, disulfuric acid, tetrahydrate
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MWC44H34N4O20S6･4H2O=1203.21
| Unit size | Price | Item Code |
|---|---|---|
| 100 mg | ＄77.00 | T003-10 |
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100 mg
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Product Description
TPPS is a water-soluble porphyrin that is reddish-purple in aqueous solution at pH 6.5 (maximum wavelength: 413 nm, molar absorptivity: 5.1×105) and green at pH 4 (maximum wavelength: 434 nm, molar absorptivity: 5.0×105). Its proton dissociation constants are reported to be pKa1=4.86 and pKa2=4.96. TPPS selectively forms a complex with Cu2+ in acidic conditions, and with Cd, Cu, Fe, Pb, and Pd in alkaline conditions.
Technical info
Table 1 Colorimetric Detection Conditions Using TPPS
References
Open References
1. A. D. Adler, et al., A Simplified Synthesis for Meso-tetraphenylporphin. J Org Chem. 1967;32:476-476.
2. J. Itoh, et al., Spectrophotometric Determinaton of Copper with α, β, γ, δ-Tetraphenylporphine Trisulfonate. Anal Chim Acta. 1975;74:53-60.
Handling and storage condition
| Appearance： | Deep green to deep greenish blue powder |
|---|---|
| Solubility in water： | To pass test (clear, deep green) |
| Molar absorptivity (pH6.5)： | ≧ 510,000 (around 413 nm) |
| Molar absorptivity (pH3.0)： | ≧ 472,000 (around 434 nm) |
| Water content： | 3.0 - 8.5 % |
| IR spectrum： | Authentic |
| Ambient temperature |
