2-hydroxy-5-(4-nitrophenyl)azo-benzoic acid
Mordant Orange 1
CAS: 2243-76-7;66676-71-9
Molecular Formula: C13H9N3O5
2-hydroxy-5-(4-nitrophenyl)azo-benzoic acid - Names and Identifiers
| Name | Mordant Orange 1 |
| Synonyms | ORANGE R C.I. 14030 terracotta2rn MORDANT ORANGE 1 Mordant Orange 1 Alizarin Yellow R Alizarine Yellow R TIMTEC-BB SBB008990 synchromateorangeaor Acid Mordant Orange R SODIUM P-NITROBENZENEAZOSALICYLATE 5-(4-Nitrophenylazo)salicylic acid SODIUM 5-(P-NITROPHENYLAZO)SALICYLATE 2-hydroxy-5-(4-nitrophenyl)azo-benzoic acid P-NITROBENZENEAZOSALICYLIC ACID SODIUM SALT 2-hydroxy-5-[(E)-(4-nitrophenyl)diazenyl]benzoic acid 3-[(4-nitrophenyl)hydrazono]-6-oxocyclohexa-1,4-diene-1-carboxylate |
| CAS | 2243-76-7 66676-71-9 |
| EINECS | 218-818-3 |
| InChI | InChI=1/C13H9N3O5/c17-12-6-3-9(7-11(12)13(18)19)15-14-8-1-4-10(5-2-8)16(20)21/h1-7,17H,(H,18,19) |
| InChIKey | ZHFPEICFUVWJIS-BGWNKZQTSA-M |
2-hydroxy-5-(4-nitrophenyl)azo-benzoic acid - Physico-chemical Properties
| Molecular Formula | C13H9N3O5 |
| Molar Mass | 287.23 |
| Density | 1.3681 (rough estimate) |
| Melting Point | 250°C |
| Boling Point | 429.53°C (rough estimate) |
| Flash Point | 299.4°C |
| Water Solubility | SOLUBLE |
| Solubility | Solubility Soluble in water, ethanol; slightly soluble in acetone |
| Vapor Presure | 6.74E-14mmHg at 25°C |
| Appearance | Red brown crystal |
| Color | Orange-brown |
| Maximum wavelength(λmax) | ['385nm'] |
| Merck | 14,255 |
| BRN | 962365 |
| pKa | 11.2(at 25℃) |
| Storage Condition | Room Temprature |
| Refractive Index | 1.5600 (estimate) |
| MDL | MFCD00007313 |
| Use | Acid-base indicator, pH 10 · 0 (yellow) ~ 12 · 0 (red). Metal colorants. 1% sodium salt is commonly used as indicator. |
2-hydroxy-5-(4-nitrophenyl)azo-benzoic acid - Risk and Safety
| Hazard Symbols | Xn - Harmful |
| Risk Codes | R22 - Harmful if swallowed R36 - Irritating to the eyes |
| Safety Description | S24/25 - Avoid contact with skin and eyes. S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. |
| WGK Germany | 3 |
| RTECS | VO5310000 |
| HS Code | 32041200 |
2-hydroxy-5-(4-nitrophenyl)azo-benzoic acid - Nature
Open Data Verified Data
brownish yellow crystal or powder. Soluble in water and ethanol, acetone-soluble, insoluble in other solvents. The aqueous solution was brownish yellow.
Last Update：2024-01-02 23:10:35
2-hydroxy-5-(4-nitrophenyl)azo-benzoic acid - Preparation Method
Open Data Verified Data
p-Nitroaniline is added to water, hydrochloric acid is added, heating is dissolved, sodium nitrite solution is added in portions, after filtration, sodium salicylate is added, heating to boiling, cooling, filtering is crude product. The crude product was treated as pure sodium salt of Alizarin yellow R.
Last Update：2022-01-01 09:24:49
2-hydroxy-5-(4-nitrophenyl)azo-benzoic acid - Introduction
Soluble in water, brown-yellow solution
Last Update：2022-10-16 17:15:03
2-hydroxy-5-(4-nitrophenyl)azo-benzoic acid - Use
Open Data Verified Data
used as an acid-base indicator, ph 10.0 (yellow) to 12.0 (red).
Last Update：2022-01-01 09:24:50
2-hydroxy-5-(4-nitrophenyl)azo-benzoic acid - Reference Information
| color index | 14030 |
| pH indicator color change ph range | 10(Yellow)-12(Violet) |
| main applications | Display device, photoresist, nanoparticles, sensors, image-recoring materials, photoconductive materials, photography, electrorheological materials, copying materials, optical engineering applications, monitoring oil degradation, lubricant, flame luminosity enhancing agent, coloring zinc, method for polymerization of vinyl chloride, determination of OH groups on resins, cosmetics, diapers, food storage, measurement of acidity injuice, say for aldehyde contents, determination of albumin, agent for plaque, method for counting leukocytes, antifungal agent |
| EPA chemical information | Information provided by: ofmpub.epa.gov (external link) |
| use | acid-base indicator, pH 10.0 (yellow) ~ 12.0 (red). Metal colorants. 1% sodium salt is commonly used as indicator. acid-base indicator, pH color change range 10.2 (yellow) to 12.0 (red) |
Last Update：2024-04-09 21:01:54
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View History
2-hydroxy-5-(4-nitrophenyl)azo-benzoic acid
CBZ-N-METHYLPHENYLALANINE
1086375-17-8
21103-30-0
6-(4,4,5,5-Tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-benzo[d]imidazole hydrochloride
4-methyl-2-(phenylmethylamino)pyrimidine-5-carboxylic acid
3-CHLORO-5-NITROBENZALDEHYDE
octasodium 2,2'-[1,4-phenylenebis[imino(6-chloro-1,3,5-triazine-4,2-diyl)imino(1-hydroxy-3,6-disulphonatonaphthalene-2,8-diyl)azo]]bisnaphthalene-1,5-disulphonate
1-methyl-1H-imidazo[4,5-c]pyridin-2(3H)-one
(S)-N-(2-Amino-2-oxoethyl)-1-(5-nitro-6-(quinolin-6-yloxy)pyrimidin-4-yl)pyrrolidine-2-carboxamide
CBZ-N-METHYLPHENYLALANINE
1086375-17-8
21103-30-0
6-(4,4,5,5-Tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-benzo[d]imidazole hydrochloride
4-methyl-2-(phenylmethylamino)pyrimidine-5-carboxylic acid
3-CHLORO-5-NITROBENZALDEHYDE
octasodium 2,2'-[1,4-phenylenebis[imino(6-chloro-1,3,5-triazine-4,2-diyl)imino(1-hydroxy-3,6-disulphonatonaphthalene-2,8-diyl)azo]]bisnaphthalene-1,5-disulphonate
1-methyl-1H-imidazo[4,5-c]pyridin-2(3H)-one
(S)-N-(2-Amino-2-oxoethyl)-1-(5-nitro-6-(quinolin-6-yloxy)pyrimidin-4-yl)pyrrolidine-2-carboxamide