o-Arsanilic acid
o-Arsanilic acid (CAS: 2045-00-3), with the chemical formula H2NC6H4AsO3H2 and a molecular weight of 217.05 g/mol, is an organic arsenic compound. It serves as a valuable building block in chemical synthesis and has been utilised in analytical chemistry for the determination of arsenic. TSS supplies this compound at a minimum purity of 98%.
- IUPAC
- 2-Aminobenzenearsonic acid
- Synonyms
- 2-Aminobenzenearsonic acid
Analytical Chemistry Reagent
o-Arsanilic acid has been employed in analytical methods for the precise determination of total arsenic concentrations in biological samples, such as urine.
Research and Development
This compound is utilised in various research settings, including studies investigating the inhibition of protein binding interactions by specific haptens in biological systems.
Organic Synthesis Intermediate
As a functionalised aromatic molecule containing arsenic, it serves as a building block in organic synthesis for creating more complex structures.
| Molecular weight | 217.05 |
|---|---|
| Linear formula | H2NC6H4AsO3H2 |
| Assay | 98% |
| Solubility | 1 M NH4OH: soluble50 mg/mL, clear to turbid (orange-brown) |
| Application | o-Arsanilic acid was used in the determination of total arsenic in urine samples using nickel and palladium as matrix modifiers1. It was used to study the inhibition of the binding of labeled anti-cross-reactive idiotype(CRI) preparations to a CRI+ hybridoma proteins by haptens in mice2. |
| Melting point | 154-155 °C(lit.) |
Hazard statements
- H301Toxic if swallowed
- H331Toxic if inhaled
- H410Very toxic to aquatic life with long-lasting effects
Precautionary statements
- P261Avoid breathing dust, fume, gas or vapours
- P273Avoid release to the environment
- P301IF SWALLOWED
- P311Call a POISON CENTER or doctor
- P501Dispose of contents and container per local regulations
| Protective equipment | dust mask type N95 (US), Eyeshields, Faceshields, Gloves, type P2 (EN 143) respirator cartridges |
|---|---|
| Transport (UN / ADR) | UN 3465 6.1 / PGIII |
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | T,N |
| Risk statements (R) | 23/25-50/53 |
| Safety statements (S) | 20/21-28-45-60-61 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
Documentation
Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.
Supply & logistics
Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.
What is o-Arsanilic acid used for?
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o-Arsanilic acid is used in analytical chemistry for determining total arsenic in samples like urine and in research for studying protein-ligand interactions. It also functions as a building block in organic synthesis.
What are the CAS number and formula for o-Arsanilic acid?
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The CAS number for o-Arsanilic acid is 2045-00-3, and its chemical formula is H2NC6H4AsO3H2.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies o-Arsanilic acid with an assay of 98%. We do not represent this product as USP, BP, EP, or any other pharmacopoeia grade.
How should o-Arsanilic acid be handled safely?
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o-Arsanilic acid is acutely toxic if swallowed or inhaled and is very toxic to aquatic life with long-lasting effects. Handle with appropriate personal protective equipment, including a dust mask (N95), eyeshields, face shields, and gloves, and ensure adequate ventilation. Refer to the safety data sheet for full details.
Is o-Arsanilic acid a controlled substance?
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Based on the provided data, o-Arsanilic acid is not classified as a controlled substance. However, due to its toxicity, strict handling and disposal procedures are required.
How can I request a sample or a quote for o-Arsanilic acid?
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To request a sample or a quote, please contact the Tech Serve Solutions sales team through our website or by phone, referencing product CAS 2045-00-3.
How is o-Arsanilic acid shipped?
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o-Arsanilic acid is shipped according to UN 3465 regulations for toxic substances, class 6.1, packaging group III. TSS is a global exporter and adheres to all relevant shipping and customs regulations.
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