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Elenco prodotti
Modello: TF-2010
marchio: Tianfu
Pacchetto: Come richiesta del compratore
produttività: 100Ton
Trasporti: Ocean,Land,Air,DHL,TNT
Luogo di origine: Cina
Supportare: 50Ton
Certificati : ISO
Porta: Shanghai port,Qingdao port
Tipo di pagamento: L/C,T/T,D/P,Paypal,Money Gram,Western Union
Incoterm: FOB,CFR,CIF,EXW,FCA,CPT,CIP
La fenolftaleina è un composto chimico con la formula C20H14O4 ed è spesso scritta come "HIn" o "phph" nella notazione stenografica. Spesso utilizzato nelle titolazioni, diventa incolore nelle soluzioni acide e rosa nelle soluzioni di base. Se la concentrazione dell'indicatore è particolarmente forte, può apparire viola. In soluzioni fortemente basiche, il colore rosa della fenolftaleina subisce una reazione di sbiadimento piuttosto lenta e di nuovo diventa incolore.
Items |
Standards |
Results |
Characteristics |
A white or almost white powder ,practically insoluble in water ,soluble in alcohol |
Conform |
Melting temperature |
≥260℃ |
260.5℃~262.6℃ |
Identification |
A Positive B Positive |
A Positive B Positive |
Appearance of solution |
The solution is clear and not more intensely coloured than reference solution Y7 |
Complies |
Related substances |
Less than 0.5% |
< 0.5% |
Heavy metals |
≤10ppm |
<10ppm |
Arsenic |
≤8ppm |
<8ppm |
Acidity or Alkalinity |
Complies |
Complies |
Chlorides |
≤100ppm |
<100ppm |
Sulphates |
≤200ppm |
<200ppm |
Organic volatile impurities |
pass |
pass |
Chromatographic impurities |
≤1.0% |
<1.0% |
Fluoran |
To pass test |
Complies |
Loss on drying |
≤0.50% |
0.10% |
Sulphated ash (Residue on ignition) |
≤0.10% |
0.02% |
Assay |
98.0%~101.0% (C20H14O4) |
99.8% |
Remark |
Storage condition: Well closed container, store protected from light |
Elenco prodotti : Materiale farmaceutico > Intermedi farmaceutici
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Privacy statement: Your privacy is very important to Us. Our company promises not to disclose your personal information to any external company with out your explicit permission.