XYLENOL ORANGE
Synonym(s):3,3′-Bis[N,N-bis(carboxymethyl)aminomethyl]-o-cresolsulfonephthalein disodium salt
- CAS NO.：1611-35-4
- Empirical Formula: C31H32N2O13S
- Molecular Weight: 672.66
- MDL number: MFCD00014580
- EINECS: 216-553-8
- SAFETY DATA SHEET (SDS)
- Update Date: 2026-01-13 11:21:21
What is XYLENOL ORANGE?
Chemical properties
Red solid
The Uses of XYLENOL ORANGE
Xylenol Orange is used in method for detecting main content of tungsten oxide.
Purification Methods
It is generally contaminated with starting material (cresol red) and semi-xylenol orange. Purify it by ion-exchange chromatography using DEAE-cellulose, eluting with 0.1M NaCl solution, which will give the sodium salt [3618-43-7].Cresol Red, semi-xylenol orange and iminodiacetic acid bands elute first. This procedure will give the sodium salt of the dye.To obtain the free acid, dissolve the salt in H2O and acidify it with AcOH. Filter it off, wash it with H2O and dry it first in air and then in a vacuum desiccator over P2O5 in the dark [Sato et al. Anal Chim Acta 94 317 1977]. [Beilstein 19 II 111, 19 III/IV 1135, 19/3 V 461.]
Properties of XYLENOL ORANGE
| Melting point: | 72-76 °C(lit.) |
| Boiling point: | 895.1±65.0 °C(Predicted) |
| Density | 1.564±0.06 g/cm3(Predicted) |
| storage temp. | -20°C |
| solubility | Solubility Soluble in water, ethanol |
| pka | 2.6, 6.4, 6.5, 10.5, 12.3(at 25℃) |
| form | powder |
| color | Brown |
| PH Range | Yellow (6.4) to orange-red (10.4) |
| λmax | 580nm |
| Major Application | Solar cells, cosmetics, determination of aluminum,nickel,bismuth,thallium,lead,zinc,palladium,mercury,proteins,lipids |
| EPA Substance Registry System | Glycine, N,N'-[(1,1-dioxido-3H-2,1-benzoxathiol-3-ylidene)bis[(6-hydroxy-5-methyl-3,1-phenylene)methylene]]bis[N-(carboxymethyl)- (1611-35-4) |
Safety information for XYLENOL ORANGE
| Signal word | Warning |
| Pictogram(s) |
 Exclamation Mark Irritant GHS07 |
| GHS Hazard Statements |
H302:Acute toxicity,oral H315:Skin corrosion/irritation H319:Serious eye damage/eye irritation H335:Specific target organ toxicity, single exposure;Respiratory tract irritation |
| Precautionary Statement Codes |
P261:Avoid breathing dust/fume/gas/mist/vapours/spray. P280:Wear protective gloves/protective clothing/eye protection/face protection. P301+P312:IF SWALLOWED: call a POISON CENTER or doctor/physician IF you feel unwell. P302+P352:IF ON SKIN: wash with plenty of soap and water. P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing. |
Computed Descriptors for XYLENOL ORANGE
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