High Purity Xylenol Orange Disodium Salt 1611-35-4 in Stock

• CAS No.: 1611-35-4
• Formula: C31h32n2o13s
• EINECS: 216-553-8
• Classification: Organic Analytical Reagents
• Grade: Ind
• Specific Usage: For Biological Purpose
• Model NO.: IND
• Content: Ind
• Source: Concrete
• Application: Scientific Research
• Property: Organic Reagent
• Melting Point: 195 °c
• Solubility in Water: 200 Mg/Ml
• Boiling Pointt: 895.1±65.0 °c at 760 Mmhg
• Density: 1.6±0.1 g/cm3
• Transport Package: 25 Kgs Fiber Drums
• Trademark: Sinochembt
• Origin: Shenyang
• HS Code: 2922499990
• Production Capacity: 500kgs Per Month

Product Description

Xylenol orange is an organic reagent, most commonly used as a tetrasodium salt as an indicator for metal titrations. When used for metal titrations, it will appear red in the titrand and become yellow once it reaches its endpoint. Historically, commercial preparations of it have been notoriously impure,^[1] sometimes consisting of as little as 20% xylenol orange, and containing large amounts of semi-xylenol orange and iminodiacetic acid. Purities as high as 90% are now available.It is fluorescent, and has excitation maximums of 440 & 570 nm and an emission maximum of 610 nm.
Grade                                 
Appearance                            Red-brown crystalline powder               
Infrared spectrometry             Conforms
λ max.                                     433.0 ~ 437.0 nm(H2O)
Absorbance                              ≥0.210(1g/L, H2O, 433.0 to 437.0 nm)(after drying)
Sensitiveness test                      pass