Molekula
Pyrogallol Red Metal Indicator
ISO 9001:2015 & ISO 14001:2015 certified · Supplying laboratories and industry since 2000 · Certificate of Analysis with every batch
Pyrogallol Red Metal Indicator is a synthetic organic compound used primarily as a selective chelometric indicator in complexometric titrations, particularly for detecting calcium and magnesium ions in water hardness analysis. It forms a red-to-blue color transition at specific pH levels, aiding precise endpoint detection. This chemical has a CAS number of 32638-88-3, with the molecular formula C19H12O8S and a molecular weight of 400.36. It is stable under ambient storage conditions and carries no signal word. Molekula supplies Pyrogallol Red Metal Indicator from research to bulk quantities with full documentation and ISO 9001:2015 traceability.
Overview
Pyrogallol Red Metal Indicator is a synthetic organic compound used primarily as a selective chelometric indicator in complexometric titrations, particularly for detecting calcium and magnesium ions in water hardness analysis. It forms a red-to-blue color transition at specific pH levels, aiding precise endpoint detection. This chemical has a CAS number of 32638-88-3, with the molecular formula C19H12O8S and a molecular weight of 400.36. It is stable under ambient storage conditions and carries no signal word. Molekula supplies Pyrogallol Red Metal Indicator from research to bulk quantities with full documentation and ISO 9001:2015 traceability.
Pricing & pack sizes
Specifications
| Property | Value |
|---|---|
| Appearance | Dark red to dark green to brown or black powder |
| Loss on Drying | (110℃) ≤5.0% |
| Appearance of Solution | - |
| Suitability | (as indicator for metal titration) Conforms |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Acidity | Acid |
Identification
| Property | Value |
|---|---|
| SKU | 90037927 |
| CAS Number | 32638-88-3 |
| Molecular Formula | C19H12O8S |
| Molecular Weight | 400.36 |
| SMILES | O=S1(=O)OC2(C3=CC=C(O)C(O)=C3OC4=C(O)C(O)=CC=C42)C=5C=CC=CC51 |
| REACH Code | Y113 |
| TSCA Listed | Yes |
| HTS Code | 29349944 |
| Tariff Code | 2934999090 |
Safety & GHS
Precautionary statements
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P308+313 IF exposed or concerned: Get medical advice/attention
- P314 Get medical advice/attention if you feel unwell
Documents
Safety Data Sheets (SDS)
Available in English, French, German, Italian, Spanish.
Certificate of Analysis (CoA) by batch
Enter a lot or batch number to retrieve the CoA for that specific batch. We can generate one from spec data if no PDF is on file.
Synonyms
No alternate names recorded for this product.
Frequently asked questions
What is Pyrogallol Red Metal Indicator used for?
Pyrogallol Red is primarily used as a metal indicator in complexometric titrations, particularly for detecting endpoints in chelatometric titrations of calcium, magnesium, and other divalent metals.
What is the chemical formula and molecular weight of Pyrogallol Red?
The chemical formula is **C₁₉H₁₂O₈S** and the molecular weight is **400.36 g/mol**.
How should Pyrogallol Red Metal Indicator be stored?
Store at **ambient temperature** in a cool, dry place, away from direct sunlight and incompatible substances.
What grade or purity is available for Pyrogallol Red?
Molekula supplies **analytical reagent (AR) grade** Pyrogallol Red, suitable for laboratory applications requiring high precision.
Can Molekula supply Pyrogallol Red in bulk quantities?
Yes, bulk quantities are available upon request—contact our sales team for custom packaging and pricing.
What documentation comes with an order of Pyrogallol Red?
Each order includes a **Certificate of Analysis (CoA)**, Material Safety Data Sheet (MSDS), and batch-specific documentation for traceability.
Ready to order or need a custom pack?
Tell us the product, grade, and quantity — Molekula usually responds within one working day with pricing and lead time.