Acid Orange 7, CAS#633‑96‑5
Acid Orange 7 is a typical representative of naphthalene‑series acid dyes, featuring vivid orange‑red shade and favorable water‑soluble properties. It exhibits good affinity for protein‑based substrates and delivers bright, uniform color after dyeing. The derived orange allergenic extract of Acid Orange 7 serves as an important reference material and is commonly utilized in laboratory allergenic testing for allergy‑related research and analytical evaluation. Beyond laboratory test applications, this dyestuff is extensively deployed in diverse industrial coloring fields. It shows stable tinting strength and consistent hue performance under regular processing conditions, making it a practical colorant choice for multiple formulation systems in industrial production.
Acid Orange 7 Chemical Properties |
Melting point | 164°C |
density | 1.525[at 20℃] |
vapor pressure | 0Pa at 25℃ |
storage temp. | Amber Vial, -20°C Freezer, Under inert atmosphere |
solubility | Very soluble in water; very slightly soluble in ethanol |
pka | 8.26, 11.4(at 25℃) |
Colour Index | 15510 |
form | Crystalline Powder |
color | Green to blue |
Odor | Odorless |
PH Range | Amber (7.4) to orange (8.6);Orange (10.2) to red (11.8) |
Water Solubility | 116 g/L (30 ºC) |
ε(extinction coefficient) | ≥17000 at 480-486nm in water at 0.01g/L |
λmax | 483nm |
Merck | 14,6858 |
BRN | 3898201 |
Stability: | Light Sensitive |
Major Application | Organic light emitting diodes (OLEDs), nanoparticles, inks, wood preservatives, textiles, hair dyes, cosmetics, wound dressing materials, biofuel cells |
Biological Applications | Cosmetics; wound dressing materials |
Cosmetics Ingredients Functions | COLORANT |
InChI | 1S/C16H12N2O4S.Na/c19-15-10-5-11-3-1-2-4-14(11)16(15)18-17-12-6-8-13(9-7-12)23(20,21)22;/h1-10,19H,(H,20,21,22);/q;+1/p-1/b18-17+; |
InChIKey | CQPFMGBJSMSXLP-ZAGWXBKKSA-M |
SMILES | [Na+].Oc1ccc2ccccc2c1\N=N\c3ccc(cc3)S([O-])(=O)=O |
LogP | -0.95 at 20℃ |
CAS DataBase Reference | 633-96-5(CAS DataBase Reference) |
EPA Substance Registry System | C.I. Acid Orange 7, monosodium salt (633-96-5) |
Safety Information |
Hazard Codes | Xi |
Risk Statements | 36/37/38 |
Safety Statements | 26-36-37/39 |
WGK Germany | 3 |
RTECS | DB7084000 |
TSCA | TSCA listed |
HS Code | 32041200 |
Storage Class | 13 - Non Combustible Solids |
As a naphthalene‑based acid dyestuff, Acid Orange 7 (CAS# 633‑96‑5) should be properly handled and disposed during practical usage, since it is classified as an environmental pollutant. Appropriate waste treatment measures are required to avoid unintended environmental contamination.
We guarantee flexible and reliable shipment arrangements for this item. For goods available in stock, delivery can be arranged within 2‑3 working days. For newly manufactured batches without ready stock, the production lead‑time will take 7‑10 working days before dispatch.
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