Full Product Specifications for 99.999% Dental/Medical Grade Silver Mercury

In the realm of dental and medical applications, 99.999% dental/medical grade silver mercury stands as a critical component, renowned for its purity and reliability in creating dental amalgam fillings. Universal Chemical Trading GmbH (https://uctr-gmbh.de/), the largest global manufacturer of this specialized mercury, ensures that hospitals and dental clinics worldwide have access to high-quality, compliant materials for restorative procedures. This blog post provides a comprehensive overview of the product specifications for dental/medical grade silver mercury, details its meticulous manufacturing process, and explores its diverse applications in hospital settings. With a focus on safety, compliance, and precision, we’ll uncover why this material remains vital in modern healthcare.

Product Specifications for 99.999% Dental/Medical Grade Silver Mercury

Below is a detailed breakdown of the specifications for dental/medical grade silver mercury, ensuring it meets the stringent requirements of ISO 24234:2017 (Dentistry – Mercury and Alloys for Dental Amalgam) and FDA Class II medical device standards (21 CFR 872.3700).

General Information

• Product Name: Dental/Medical Grade Silver Mercury (Elemental Mercury, Quicksilver)

• Purity: ≥99.999% (5N, ACS Reagent Grade Equivalent)

• CAS Number: 7439-97-6

• EC Number: 231-106-7

• Molecular Formula: Hg

• Molecular Weight: 200.59 g/mol

• HS Code: 2805.40.00 (Pure mercury); 3006.40.00 (Pre-mixed amalgam kits)

• UN Number: UN 2809 (Mercury, Class 8, Packing Group III)

• Intended Use: Preparation of dental amalgam for restorative fillings; limited medical applications (e.g., calibration, research). Not for direct human consumption.

• Regulatory Compliance: FDA Class II, ISO 24234:2017, ANSI/ADA Specification No. 1, Minamata Convention, EU REACH Annex XVII (restricted).

Purity and Impurity Profile

Achieved through quadruple distillation, ensuring ultra-low impurities for biocompatibility:

• Purity (Hg Content): ≥99.999% (Verified by ICP-MS)

• Non-Volatile Matter: ≤5 ppm

• Total Residue on Ignition: ≤0.001% (10 ppm)

• Key Impurities (ppm max):

  • Iron (Fe): ≤0.2

  • Heavy Metals (as Pb): ≤0.4

  • Copper (Cu): ≤0.1

  • Zinc (Zn): ≤0.1

  • Lead (Pb): ≤0.05

  • Arsenic (As): ≤0.01

  • Cadmium (Cd): ≤0.01

• Mercury Vapor Release: ≤0.2 μg/m³ (ISO 24234, simulated oral conditions)

• Biocompatibility: Meets ISO 10993-1; no cytotoxicity in finished amalgam (ISO 7405:2018)

Physical and Chemical Properties

• Appearance: Silvery-white, mirror-like liquid; free of particles

• Physical State: Liquid at 25°C

• Odor: Odorless

• Density: 13.534 g/cm³ at 25°C

• Melting Point: -38.83°C

• Boiling Point: 356.73°C

• Vapor Pressure: 0.0012 mmHg at 20°C

• Solubility: Insoluble in water, HCl, ethanol; soluble in HNO₃, aqua regia

• Stability: Stable if sealed; oxidizes slowly in air

Packaging and Handling

• Packaging: 1 kg borosilicate glass bottles, 34.5 kg iron flasks, or pre-capsulated (400–600 mg per dental dose)

• Net Weight: 10–50 g (sachets), 34.5 kg (bulk)

• Shipping: Hazardous material (IATA-compliant); triple-layered packaging

• Storage: Cool (<25°C), sealed containers to prevent vapor escape

• Price Range: €200–€300/kg (varies by volume; contact UCTR for quotes)

Each batch includes a Certificate of Analysis (COA) from third-party labs (e.g., SGS), ensuring compliance with global standards.

Manufacturing Process of Dental/Medical Grade Silver Mercury

Producing 99.999% dental/medical grade silver mercury is a highly controlled process, executed with precision to meet medical standards. Universal Chemical Trading GmbH, based in Dollern, Germany, employs state-of-the-art techniques to deliver this critical material to hospitals worldwide. Here’s how it’s made:

1. Raw Material Sourcing:

   • Mercury is extracted from cinnabar ore (HgS), a naturally occurring sulfide mineral, sourced from certified mines compliant with environmental regulations.

   • Ore undergoes initial screening to remove impurities like sulfur or silicates.

2. Primary Distillation:

   • Cinnabar is roasted at 600–700°C in a rotary furnace, releasing mercury vapor (Hg) and sulfur dioxide (SO₂).

   • Vapor is condensed into liquid mercury, achieving ~98% purity.

3. Quadruple Distillation:

   • The liquid undergoes four successive vacuum distillations at controlled temperatures (350–400°C) to remove trace metals (e.g., lead, arsenic).

   • Each cycle increases purity, culminating in ≥99.999% (5N) grade, verified by ICP-MS.

4. Filtration and Stabilization:

   • Microfiltration eliminates non-volatile residues (e.g., oxides, ash).

   • The mercury is stabilized in an inert atmosphere (nitrogen-filled) to prevent oxidation.

5. Quality Assurance:

   • Samples are tested for purity, vapor release, and biocompatibility using ASTM E300, USP <231>, and ISO 24234 standards.

   • Packaging occurs in sealed borosilicate glass or iron containers to ensure safety and stability during global transport.

This rigorous process ensures that UCTR’s dental/medical grade silver mercury meets the exacting demands of hospital applications, minimizing health risks and environmental impact.

Applications of Dental/Medical Grade Silver Mercury in Hospitals

While primarily known for dental amalgam, 99.999% silver mercury serves multiple roles in hospital settings, driven by its unique properties and Universal Chemical Trading’s reliable supply:

1. Dental Amalgam Fillings:

   • Primary Use: Mixed with silver-tin-copper alloy powder (50:50 ratio) to form durable amalgam for cavity fillings. Its high purity ensures low vapor release, reducing patient exposure.

   • Benefits: Cost-effective, long-lasting (10–20 years), and resistant to oral corrosion.

   • Standards: Complies with ISO 24234 and FDA regulations for safe dental restorations.

2. Calibration of Medical Equipment:

   • Used in high-precision thermometers, sphygmomanometers, and manometers due to its consistent density and thermal conductivity.

   • Ensures accurate readings in diagnostic tools, though non-mercury alternatives are increasingly preferred.

3. Laboratory and Research:

   • Employed in hospital labs for chemical analysis (e.g., as a reagent in trace metal detection via cold vapor atomic absorption spectroscopy).

   • Supports toxicology studies or calibration of analytical instruments.

4. Historical Medical Uses (Limited):

   • Previously used in antiseptics (e.g., mercurochrome) or as a component in certain diagnostic reagents, though largely phased out due to toxicity concerns and Minamata Convention restrictions.

Note: The Minamata Convention (2013) limits mercury use in healthcare, promoting alternatives like resin composites for dental fillings. Hospitals must comply with local regulations (e.g., EPA in the U.S., EU REACH) and recycle mercury waste via approved facilities.

Safety and Regulatory Considerations

• Health Risks: Mercury is toxic if inhaled or absorbed; causes neurological/kidney damage. LD50 (oral, rat): 0.01 mL/kg. Use in fume hoods with PPE (nitrile gloves, respirators).

• Environmental Impact: Dispose via certified recycling programs to prevent contamination. UCTR provides guidance on safe handling.

• Legal Restrictions: Banned for non-essential uses in many regions; dental use requires permits in EU, U.S., and other jurisdictions.

For detailed safety protocols, consult UCTR’s Material Safety Data Sheet (MSDS) at https://uctr-gmbh.de/.

Why Choose Universal Chemical Trading?

As the world’s largest manufacturer of dental/medical grade silver mercury, Universal Chemical Trading GmbH delivers unparalleled quality and supply reliability. Their 5N mercury is produced in Dollern, Germany, with bulk availability (34.5 kg flasks) and smaller dental sachets (10–50 g). With discreet global shipping and competitive pricing (€200–€300/kg), UCTR supports hospitals and clinics in maintaining high standards of care.

Conclusion

99.999% dental/medical grade silver mercury is a cornerstone of dental restoration and select hospital applications, offering unmatched purity and reliability. Universal Chemical Trading’s meticulous manufacturing process ensures compliance with global standards, while its versatile uses—from amalgam fillings to equipment calibration—highlight its value in healthcare. For professionals seeking a trusted supplier, visit https://uctr-gmbh.de/ to explore their offerings and elevate your practice.

Have questions about integrating silver mercury into your hospital’s workflow? Contact UCTR or share your thoughts below!

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