VAQORAPAR, indicator, 99%+
Synonyms: 4-(2-Pyridylazo)resorcinol monosodium salt hydrate · PAR monosodium salt hydrate · 1,3-Benzenediol, 4-(2-pyridinylazo)-, monosodium salt, monohydrate · sodium (E)-3-hydroxy-4-(pyridin-2-yldiazenyl)phenolate hydrate
CAS No.16593-81-0
FormulaC11H10N3NaO3
Mol. weight255.20
Catalogue No.VQ-000677
Purity≥99%
HSN29333990
PAR, indicator (CAS 16593-81-0) – biological stain, Microscopy grade, ≥99%. C11H10N3NaO3, MW 255.2. Supplied by Vaqora Chemicals with COA, exported worldwide.
Batch COA with every lot
16-section GHS SDS
Export to 120+ countries
DG-compliant packing
About PAR, indicator, 99%+
Vaqora Chemicals supplies PAR, indicator (Microscopy grade), a biological stain registered under CAS number 16593-81-0 at a purity of ≥99%. Its molecular formula is C11H10N3NaO3 and its molecular weight is 255.2 g/mol. The IUPAC name is sodium, 3-hydroxy-4-(pyridin-2-yldiazenyl)phenolate. Hydrate. Common synonyms include PAR monosodium salt hydrate and C11H10N3NaO3.
In its supplied form it is orange-brown powder or crystals. Store in a tightly closed container in a cool, dry and well-ventilated place. Under GHS it is labelled “Warning”, so handle it with suitable PPE and consult the SDS.
Key uses span histology and cytology staining, microscopy, clinical laboratories and indicator for titrations. It is used across academic and industrial research, diagnostics and biotechnology and textiles and dyeing.
We offer PAR, indicator in 1 g, 5 g, 25 g and 1 kg packs with a batch-specific COA, and ship to customers worldwide.
Typical applications
- Histology & cytology staining
- Microscopy
- Clinical laboratories
- Indicator for titrations
Industries
Specifications & identifiers
| Product name | PAR, indicator, 99%+ |
|---|---|
| Catalogue No. | VQ-000677 |
| CAS Number | 16593-81-0 |
| IUPAC name | sodium;3-hydroxy-4-(pyridin-2-yldiazenyl)phenolate;hydrate |
| Molecular formula | C11H10N3NaO3 |
| Molecular weight | 255.2 g/mol |
| Exact mass | 255.062 |
| Grade | Microscopy |
| Purity / assay | ≥99% |
| HSN code | 29333990 |
| InChIKey | KMHFHNVYQMFVAN-UHFFFAOYSA-M |
| SMILES | C1=CC=NC(=C1)N=NC2=C(C=C(C=C2)[O-])O.O.[Na+] |
| PubChem CID | 135442939 |
| Physical form | Crystalline |
|---|---|
| Appearance | Orange-brown powder or crystals |
| H-bond donors / acceptors | 2 / 6 |
| TPSA | 81.9 Ų |
| Synonyms | 4-(2-Pyridylazo)resorcinol monosodium salt hydrate, PAR monosodium salt hydrate, 1,3-Benzenediol, 4-(2-pyridinylazo)-, monosodium salt, monohydrate, sodium (E)-3-hydroxy-4-(pyridin-2-yldiazenyl)phenolate hydrate, sodium 3-hydroxy-4-[(1E)-2-(pyridin-2-yl)diazen-1-yl]benzen-1-olate hydrate, C11H10N3NaO3, 4-(2-pyridylazo) resorcinol monosodium salt hydrate, 4-(2-pyridyldiazenyl)benzene-1,3-diol, sodium salt, hydrate, Sodium 3-oxo-4-[2-(pyridin-2-yl)hydrazinylidene]cyclohexa-1,5-dien-1-olate--water (1/1/1) |
Safety & hazard information (GHS)
Signal word: Warning
Hazard statements
H315Causes skin irritationH319Causes serious eye irritationH335May cause respiratory irritation
Precautionary statements: P261, P264, P264 + P265, P271, P280, P302 + P352, P304 + P340, P305 + P351 + P338, P319, P321, P332 + P317, P337 + P317, P362 + P364, P403 + P233, P405, P501
Classification is indicative (aggregated GHS notifications) and may vary by grade and concentration. Always refer to the SDS supplied with your lot.
Documents
Other grades of CAS 16593-81-0
Frequently asked questions
What is the CAS number of PAR, indicator, 99%+?
The CAS Registry Number of PAR, indicator, 99%+ is 16593-81-0. It is also known as 4-(2-Pyridylazo)resorcinol monosodium salt hydrate, PAR monosodium salt hydrate, 1,3-Benzenediol, 4-(2-pyridinylazo)-, monosodium salt, monohydrate.
What is the molecular formula and molecular weight of PAR, indicator, 99%+?
PAR, indicator, 99%+ has the molecular formula C11H10N3NaO3 and a molecular weight of 255.2 g/mol.
Which grade and pack sizes of PAR, indicator, 99%+ can I order?
We supply PAR, indicator, 99%+ in Microscopy (≥99%) grade, in 1 g, 5 g, 25 g, 1 kg packs. Larger bulk quantities and custom packing are quoted on request.
Do you provide a COA and SDS with PAR, indicator, 99%+?
Yes. Every lot of PAR, indicator, 99%+ is shipped with a batch-specific Certificate of Analysis, and a 16-section GHS Safety Data Sheet is provided with the quotation and the shipment.
Can PAR, indicator, 99%+ be shipped internationally?
Yes. PAR, indicator, 99%+ is classified as hazardous, so it is packed in UN-approved packaging and shipped as dangerous goods under IATA/IMDG rules. We export worldwide on EXW, FOB, CIF and DAP terms.
Enquire about PAR, indicator, 99%+
We reply within one business day with price, pack options, lead time and documentation.
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