Nitrazine Yellow
Synonym(s):2-(2,4-Dinitrophenylazo)-1-hydroxynaphthalene-3,6-disulfonic acid disodium salt;2-(2,4-Dinitrophenylazo)naphthol-3,6-disulfonic acid disodium salt;Nitrazol Yellow
- CAS NO.：5423-07-4
- Empirical Formula: C16H11N4NaO11S2
- Molecular Weight: 522.39
- MDL number: MFCD00003938
- EINECS: 226-549-8
- SAFETY DATA SHEET (SDS)
- Update Date: 2024-07-15 16:45:23
What is Nitrazine Yellow?
Chemical properties
bordeaux to brown powder, soluble in water, dilute acid and dilute alkali. The maximum absorption wavelength is 586nm.
The Uses of Nitrazine Yellow
Nitrazine Yellow is a pH-sensitive azo dye. It changes color from yellow to blue in pH range 6.0–7.0 and is widely used in microscopy. Dyes and metabolites.
What are the applications of Application
Nitrazine Yellow is a pH indicator with a variety of applications
What are the applications of Application
Nitrazine Yellow is used to test vaginal pH during late pregnancy to determine the breakage of the amniotic sac. To perform a fecal pH test for diagnosing intestinal infections or other digestive problems. In civil engineering, to determine the carbonatation spread in concrete structures and therefore assess the state of the rebar's passivation film.
Properties of Nitrazine Yellow
| Melting point: | >250°C |
| storage temp. | 2-8°C |
| solubility | Solubility Soluble in water, acetic acid ethanol |
| Colour Index | 14890 |
| form | Powder |
| color | Brown to yellow to orange |
| PH Range | Bright yellow (6.0) to bright blue (7.2) |
| Water Solubility | Dissolve in water at 1mg/ml |
| λmax | 586nm |
| Major Application | Sensors, display devices, sol-gel matrix, electrorheological materials, diesel feuls/kerosines, detergent, fabric softner, food storage, method for identifying fresh & stale rice, in dialysis solution, screening of NAD-binding, monitoring secreted body fluids, lymph node, diagnostic pads, vaginal infection test method, assay for esterolyticenzyme activity, detecting pathogenic bacteria, diagnosis of bacterial vaginosis, detecting dysfunctional pregnancy, drugs screening |
| CAS DataBase Reference | 5423-07-4(CAS DataBase Reference) |
| EPA Substance Registry System | 2,7-Naphthalenedisulfonic acid, 3-[(2,4-dinitrophenyl)azo]-4-hydroxy-, disodium salt (5423-07-4) |
Safety information for Nitrazine Yellow
| Signal word | Danger |
| Pictogram(s) |
 Exclamation Mark Irritant GHS07  Health Hazard GHS08 |
| GHS Hazard Statements |
H317:Sensitisation, Skin H340:Germ cell mutagenicity H413:Hazardous to the aquatic environment, long-term hazard |
| Precautionary Statement Codes |
P201:Obtain special instructions before use. P202:Do not handle until all safety precautions have been read and understood. P261:Avoid breathing dust/fume/gas/mist/vapours/spray. P272:Contaminated work clothing should not be allowed out of the workplace. P273:Avoid release to the environment. P280:Wear protective gloves/protective clothing/eye protection/face protection. P302+P352:IF ON SKIN: wash with plenty of soap and water. P308+P313:IF exposed or concerned: Get medical advice/attention. P333+P313:IF SKIN irritation or rash occurs: Get medical advice/attention. P405:Store locked up. P501:Dispose of contents/container to..… |
Computed Descriptors for Nitrazine Yellow
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