APEX LABS | LABORATORY CHEMICALS & INDICATORS
MUREXIDE (C.I. NO. 56085) 5 GMS – OXFORD LAB FINE CHEM
High-purity complexometric indicator powder (Ammonium Purpurate) for calcium and transition metal titrations.
Code: A-00818
5 Grams Pack
Oxford Lab Fine Chem
Product at a Glance
Murexide (C.I. No. 56085 / Ammonium Purpurate) 5 gms manufactured by Oxford Lab Fine Chem LLP (Product Code: A-00818) is a specialized metallochromic indicator powder widely used for complexometric EDTA titrations, specifically for the selective determination of calcium ions in the presence of magnesium. It delivers a sharp visual color shift from pink-red to purple-violet. Supplied by Apex Labs with complete GST tax invoices and Government e-Marketplace (GeM) portal support.
Note: Images for illustration purposes only. Actual bottle shape, cap color, or label design may vary based on manufacturer batches.
Product Overview: Murexide Indicator Powder
Murexide (Ammonium Purpurate, C.I. 56085) is an organic ammonium salt used extensively as an analytical reagent and complexometric indicator. Product Code A-00818 from Oxford Lab Fine Chem LLP is refined to ensure high sensitivity when detecting calcium ($\text{Ca}^{2+}$) ions during volumetric analysis.
In strongly alkaline solutions (typically above pH 12), calcium ions form a pink-red colored complex with murexide. As EDTA is added during titration, it preferentially chelates the calcium, releasing the free indicator which turns a distinct purple-violet color, providing an unmistakable endpoint.
Explore our comprehensive range of complexometric indicators, volumetric reagents, and fine chemicals in our laboratory chemicals catalog.
Key Specifications
COLOR INDEX NO.
C.I. 56085
PRODUCT CODE
A-00818
ENDPOINT SHIFT
Pink-Red to Purple
PACK WEIGHT
5 Grams
Technical Specifications
| Specification Parameter | Technical Benchmark |
|---|---|
| Chemical Product Name | Murexide / Ammonium Purpurate |
| Manufacturer Product Code | A-00818 |
| CAS Registration Number | 30509-55-0 |
| Color Index Designation | C.I. |
| 56085 | Color Transition Profile | Pink-Red (Calcium Complex) to Purple-Violet (Free Indicator at pH > 12) | Packaging Size | 5 Grams Container | Physical Appearance | Reddish-purple to dark purple crystalline powder | Solubility Profile | Slightly soluble in Water; Insoluble in Absolute Alcohol and Ether | Manufacturer | Oxford Lab Fine Chem LLP | Authorized Supplier | Apex Labs (Varanasi, UP, India) |
Key Product Features
Selective Calcium Detection
Enables precise complexometric titration of calcium ions even in the presence of magnesium under high-pH conditions.
High Metallochromic Purity
Refined to eliminate trace organic contaminants on your Murexide Indicator 5g, ensuring sharp visual titration endpoints.
Dry Powder Triturate Ready
Easily ground with sodium chloride (NaCl) to prepare stable dry indicator powder mixtures for routine laboratory workflows.
Trusted Brand Manufacturer
Produced by Oxford Lab Fine Chem LLP under controlled quality standards for consistent analytical performance.
Primary Sector Applications
- Calcium Estimation: Complexometric titration of calcium in water hardness testing, biological fluids, and mineral samples.
- Metallurgical Analysis: Quantitative determination of nickel, cobalt, and copper ions in alloy and ore testing.
- Educational Chemistry Practicals: Advanced analytical reagent used in university laboratories for selective metal ion determinations.
- Pharmaceutical QC: Testing calcium content in raw materials, excipients, and nutritional formulations.
B2B • INSTITUTIONAL • BULK PROCUREMENT
Bulk Procurement & GeM Supply Lines
Apex Labs supplies genuine laboratory indicators and reagents from Oxford Lab Fine Chem LLP with full commercial GST tax invoices for seamless Input Tax Credit (ITC) reconciliation.
We support universities, CSIR institutes, testing laboratories, and industrial R&D units via direct bulk supply or official tender fulfillment on the Government e-Marketplace (GeM) portal.
Product Specification & Direct Ordering
A-00818 Murexide 5g Oxford Lab Fine Chem: Complexometric indicator (C.I. 56085 / Ammonium Purpurate) for calcium and transition metal titrations.
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Frequently Asked Questions
1. What is Murexide primarily used for in volumetric analysis?
Murexide is used as a metallochromic indicator for complexometric EDTA titrations, specifically enabling the selective estimation of calcium ions in solution.
2. What is the color change of Murexide at the titration endpoint?
In alkaline media (pH > 12) containing calcium, the solution is pink-red due to the metal-indicator complex. At the endpoint with EDTA, it shifts to purple-violet.
3. Can academic institutions and testing labs purchase this via GeM with GST invoices?
Yes, Apex Labs supplies all Oxford Lab Fine Chem products with itemized GST tax invoices for ITC compliance and supports direct bidding and institutional supply through the Government e-Marketplace (GeM) portal.
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