Azomethin-H-Monosodium Salt Hydrate
CAS206752-32-1
Azomethine-H monosodium salt hydrate (CAS 206752-32-1) is a water-soluble chromogenic reagent for the colorimetric determination of boron. In weakly acidic aqueous solution it forms a yellow-orange complex with borate, measured at about 415 nm, without the concentrated acid required by the curcumin method. KingPharm supplies Azomethine-H monosodium salt hydrate for research and production use with a batch-specific certificate of analysis.
- CAS No.
- 206752-32-1
- Formula
- C17H12NO8S2Na.xH2O
- Mol. weight
- 445.40 g/mol
- Appearance
- Orange to Yellow Powder
Product Description
Azomethine-H monosodium salt hydrate is the sodium salt of the Schiff base formed from H-acid (8-amino-1-naphthol-3,6-disulfonic acid) and salicylaldehyde. It is an orange powder, soluble in water, ethanol and acetone, and is used mainly as a spectrophotometric reagent for trace boron.
In a buffered, weakly acidic medium, boric acid binds the hydroxyl groups of the reagent to form a colored complex whose absorbance near 415 nm is proportional to boron concentration. EDTA is usually added to the buffer to mask interfering ions such as copper, iron and aluminium.
Compared with the curcumin method, the azomethine-H method works in aqueous solution and avoids concentrated sulfuric acid and evaporation to dryness. This makes it simpler, faster and easier to automate for routine analysis of soil extracts, plant digests and water samples.
For purchasing, check assay, appearance, water solubility and absorbance of the reagent blank, as these affect calibration linearity and detection limit. KingPharm supplies each batch with a certificate of analysis; specification and other documents are available on request.
Chemical Specifications
Identifiers
| CAS number | 206752-32-1 |
|---|---|
| Product name | Azomethin-H-Monosodium Salt Hydrate |
| Chinese name | 甲亚胺-H酸-单钠盐水合物 |
| IUPAC name | sodium;5-hydroxy-4-[(2-hydroxyphenyl)methylideneamino]-7-sulfonaphthalene-2-sulfonate;hydrate |
| Synonyms | Metal Indicator; boron detection; analytical reagent |
| Molecular formula | C17H12NO8S2Na.xH2O |
| Molecular weight | 445.40 g/mol |
| EC number | 250-975-3 |
| PubChem CID | 3083920 |
| InChIKey | AAIGDXDVSZJVSW-UHFFFAOYSA-M |
| SMILES | C1=CC=C(C(=C1)C=NC2=C3C(=CC(=C2)S(=O)(=O)[O-])C=C(C=C3O)S(=O)(=O)O)O.O.[Na+] |
Physical and chemical properties
| Appearance | Orange to Yellow Powder |
|---|---|
| Melting Point | >300 ( ℃ ) |
Applications
Azomethine-H is used wherever trace boron needs to be quantified by simple colorimetry.
Soil and plant boron testing
Determination of available boron in soil extracts and total boron in plant tissue digests for nutrient diagnosis.
Water analysis
Colorimetric determination of boron in irrigation water, drinking water and hydroponic nutrient solutions.
Fertilizer and compost analysis
Quantification of boron content in fertilizers, composts and manure.
Materials testing
Determination of microgram levels of boron in materials such as glass and steel.
Quality Documentation
The following documents can be provided for Azomethin-H-Monosodium Salt Hydrate to support technical evaluation and purchasing. Documents are issued for the specific grade and batch supplied.
-
Certificate of Analysis (COA) Batch-specific test results against the specification.
-
Product specification The release specification with test items, limits and methods.
Packaging, Storage & Transport
| Available pack sizes | 10 kg, 1 kg, 500 g, 100 g, 25 g |
|---|
Safety and transport
| Hazard Level | 固体普货 |
|---|
Read the current safety data sheet before handling. Packaging can be adapted to the order quantity and destination.
Frequently Asked Questions
How does the azomethine-H method compare with the curcumin method?
The azomethine-H method is carried out in weakly acidic aqueous solution, avoiding concentrated sulfuric acid and evaporation steps, and is generally faster and easier to automate for routine soil, plant and water analysis.
How are interfering metal ions handled?
EDTA is typically included in the buffer to mask ions such as copper, iron and aluminium before color development.
How should Azomethine-H monosodium salt hydrate be stored?
Keep the container tightly closed in a cool, dry, well-ventilated place at room temperature.
What is the CAS number of Azomethin-H-Monosodium Salt Hydrate?
The CAS Registry Number of Azomethin-H-Monosodium Salt Hydrate is 206752-32-1. Azomethin-H-Monosodium Salt Hydrate is also known as Metal Indicator; boron detection; analytical reagent.
What is the molecular formula and molecular weight of Azomethin-H-Monosodium Salt Hydrate?
The molecular formula of Azomethin-H-Monosodium Salt Hydrate is C17H12NO8S2Na.xH2O, and its molecular weight is 445.40 g/mol.
What is Azomethin-H-Monosodium Salt Hydrate used for?
Azomethine-H is used wherever trace boron needs to be quantified by simple colorimetry.
Which quality documents are available for Azomethin-H-Monosodium Salt Hydrate?
The following documents are available for Azomethin-H-Monosodium Salt Hydrate: Certificate of Analysis (COA); Product specification. Contact KingPharm to request the documents for a specific batch.
How can I request a quotation for Azomethin-H-Monosodium Salt Hydrate?
Send an inquiry for Azomethin-H-Monosodium Salt Hydrate (CAS 206752-32-1) with the required quantity, target specification, destination country and any documentation requirements. KingPharm will confirm availability, packaging, lead time and price.
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Page last reviewed on by Leo Xiao.