Glycine,N,N'-[(1,1-dioxido-3H-2,1-benzoxathiol-3-ylidene)bis[(6-hydroxy-5-methyl-3,1-phenylene)methylene]]bis[N-(carboxymethyl)-

IUPAC Name: 2-[[5-[3-[3-[[Bis(carboxymethyl)amino]methyl]-4-hydroxy-5-methylphenyl]-1,1-dioxobenzo[c]oxathiol-3-yl]-2-hydroxy-3-methylphenyl]methyl-(carboxymethyl)amino]acetic acid  
Molecular Formula: C₃₁H₃₂N₂O₁₃S
Molecular Weight: 672.66
EINECS: 216-553-8
Density: 1.564 g/cm³
Melting Point: 72-76 °C(lit.)
Boiling Point: 895.1 °C at 760 mmHg
Flash Point: 495.1 °C
Freely Rotating Bonds: 16
Polar Surface Area: 181.89 Å²
Index of Refraction: 1.678
Molar Refractivity: 162.29 cm³
Molar Volume: 430 cm³
Polarizability: 64.33 ×10^-24 cm³
Surface Tension: 82.8 dyne/cm
Enthalpy of Vaporization: 136.3 kJ/mol
Vapour Pressure: 1.97E-34 mmHg at 25°C 
Solubility:  200 mg/mL in water
 The Cas Register Number  of Xylenol orange is 1611-35-4.The chemical synonyms of Xylenol orange (CAS NO.1611-35-4) are 2,2',2'',2'''-{(1,1-Dioxido-3H-2,1-benzoxathiole-3,3-diyl)bis[(6-hydroxy-5-methyl-3,1-phenylene)methylenenitrilo]}tetraacetic acid ; 2,2',2'',2'''-{(1,1-dioxido-3H-2,1-benzoxathiole-3,3-diyl)bis[(6-hydroxy-5-methylbenzene-3,1-diyl)methanediylnitrilo]}tetraacetic acid ; Cresol Phthalexon S ; 3,3'-Bis(N,N-di-(carboxymethyl)aminomethyl)cresolsulfonephthalein ; 3,3'-Bis[N, N-di-(carboxymethyl)aminomethyl]cresolsulfonephthalein ; 5',5"-bis((bis(carboxymethyl)amino)methyl)-o-cresolsulfophthal ; Acetic acid, (3H-2,1-benzoxathiol-3-ylidenebis((6-hydroxy-5-methyl-m-phenylene)methylenenitrilo))tetra-, S,S-dioxide (8CI) ; Glycine, N, N'-[[hydroxy(2-sulfophenyl)methylene]bis[(6-hydroxy-5-methyl-3, 1-phenylene)methylene]]bis[N-(carboxymethyl)-, .gamma.-sultone ; Glycine, N,N'-((1,1-dioxido-3H-2,1-benzoxathiol-3-ylidene)bis((6-hydroxy-5-methyl-3,1-phenylene)methylene))bis(N-(carboxymethyl)- ; Glycine, N,N'-(3H-2,1-benzoxathiol-3-ylidenebis((6-hydroxy-5-methyl-3,1-phenylene)methylene))bis(N-(carboxymethyl)-, S,S-dioxide ; m-Cresolphthalexon S ; N,N'-(3H-2,1-Benzoxathiol-3-ylidenebis((6-hydroxy-5-methyl-3,1-phenylene)methylene))bis(N-(carboxy methyl)glycine) S,S-dioxide ; o-Cresolphthalexon S ; Xylenol orange  .The molecular structure of Xylenol orange (CAS NO.1611-35-4) is.

  Xylenol orange (CAS NO.1611-35-4) is used as determination indicator of acid-base  and bismuth, thorium, lead, cobalt, copper, iron, aluminum complex indicator .

Hazard Codes: Xi
Risk Statements: 23/24/25-36/38-36/37/38 
R23/24/25: Toxic by inhalation, in contact with skin and if swallowed. 
R36/38: Irritating to eyes and skin. 
R36/37/38: Irritating to eyes, respiratory system and skin.
Safety Statements: 24/25-45-36/37-26-22-36 
S24/25: Avoid contact with skin and eyes. 
S45: In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) 
S36/37: Wear suitable protective clothing and gloves. 
S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. 
S36: Wear suitable protective clothing.
WGK Germany: 3