Sodium Tripolyphosphate (Food Grade, Kosher)

Sodium tripolyphosphate, also known as sodium triphosphate or STPP, is mainly consumed as a component of commercial detergents. It serves as a builder or water softener, particularly in hard water containing high concentrations of magnesium and calcium ions. In such conditions, detergents can be deactivated. However, STPP, being a highly charged chelating agent, tightly binds to calcium and magnesium ions, preventing their interference with sulfonate detergent performance.

STPP is not only used in detergents but also serves as a preservative for seafood, meats, poultry, and animal feeds. In the food industry, it is commonly known as E451 and finds usage as an emulsifier and moisture retainer. Many governments regulate the quantities allowed in foods, as STPP can substantially increase the sale weight of seafood. The United States Food and Drug Administration recognizes STPP as "generally recognized as safe."

Sodium tripolyphosphate is available in low density, medium density, and high-density granular powders. The specific product being described here is a medium density variant. It is categorized as food (FCC) grade, granular, medium density, and Kosher-certified. Besides its primary uses in water softening and as a sequestering agent, STPP can also function as a peptizing or deflocculating agent. Furthermore, it has applications in detergents, soaps, and ceramics.

The chemical structure of sodium tripolyphosphate is [Na5P3O10]n. It is also known by synonyms such as sodium triphosphate, triphosphoric acid pentasodium salt, sodium phosphate tripoly, STPP, pentasodium triphosphate, and pentasodium tripolyphosphate. The product is packaged in 50-lb bags by the original manufacturer, while smaller quantities are repacked for laboratory, research, and industrial uses. The CAS number for sodium tripolyphosphate is [7758-29-4][Na5O10P3]n.

Sodium tripolyphosphate exhibits low toxicity, making it a safe choice for various applications.

Key Features:

• Effective detergent component and water softener
• Chelating agent that prevents interference with sulfonate detergents
• Preservative for seafood, meats, poultry, and animal feeds
• Emulsifier and moisture retainer in food production
• Regulatory compliance and recognized as safe by FDA

Product Specifications:

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Caution: Sodium tripolyphosphate is generally safe for use as directed. However, individuals with specific allergies or sensitivities should exercise caution and consult a healthcare professional if necessary.

Carbon Electrode - Graphite Rod

If you're looking for a highly conductive cylindrical graphite block, our Carbon Electrode - Graphite Rod is the perfect fit for you. With a diameter of 10mm and a length of 100mm, this electrode is ideal for forming electric arcs or as an electrode in basic electrolysis experiments. It's also perfect for students conducting experiments requiring a carbon electrode.

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CAUTION: This product is highly conductive and should be used with care. Always wear appropriate protective gear and follow proper safety protocols when working with electrodes.

Perfect for:

• Students conducting experiments requiring carbon electrode

Density Cubes Set

Set of 12 metal and non-metal cubes for learning about density and physical properties.

Key Features

• Provides a tangible, hands-on way of learning about mass, volume, specific gravity, buoyancy, and floatation.
• Each cube has a unique density and weight.
• Metals include major commercial alloys.
• Comes with a material identification guide online or in print.

Product Specifications:

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Density Cubes Set 10mm

The Density Cubes Set is an essential tool for understanding metal density and physical properties, featuring twelve meticulously crafted cubes of Iron, Aluminum, Zinc, Lead, Brass, and Copper. Each cube measures 10mm, perfect for comparative studies in science and metallurgy.

Key Features

• Two sets of six different metal cubes
• Precise 10mm cube dimensions
• Included metals: Iron, Aluminum, Zinc, Lead, Brass, Copper
• Ideal for educational and comparative purposes
• Durable and high-quality material composition

Product Specifications

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Caution: Handle with care due to sharp edges. Not suitable for children without supervision.

Density Cubes, Set Of 5 Non-Metal Cubes

This set of 5 non-metal cubes is an essential tool for exploring and comparing the density and physical properties of different materials. Each cube, made from unique materials like rubber, acrylic, plastic, softwood, and hardwood, measures 20mm. Ideal for educational purposes in physical science and material studies.

Key Features

• Set of 5 different material cubes
• Uniform 20mm size for easy comparison
• Includes rubber, acrylic, plastic, softwood, and hardwood
• Ideal for density and physical properties analysis
• Perfect educational tool for material science

Product Specifications

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Iron Powder, Super Fine, Light

Iron Powder, Super Fine, Light is a high-purity elemental iron powder manufactured through metallurgical reduction processes using hydrogen gas. This powder features irregular-shaped particles with a porous, sponge-like structure, giving it low density and non-flowing properties. Unlike other super fine iron powders, this product is unique due to its shape and density. It is suitable for a range of applications, including cold casting, resin casting, metal clay work, magnetic pigments, fingerprinting, and the creation of magnetic paints. While it can be used for tension control devices, higher-density free-flowing versions (IRON325ZV and IRON325AT) are recommended for these specific applications.
The powder has an iron content of over 97.7%, with low acid insolubility and an apparent density of less than 2.2 g/cm³. The screen analysis shows that 97.5% of the particles are finer than 325 mesh.
Note: This product is no longer in production, and only limited quantities are available. Consider using alternatives such as IRON325AT or IRON325ZV.

Key Features

• Over 97.7% iron content
• Low-density, porous, non-flowing powder
• Suitable for cold casting, resin casting, and metal clay work
• Ideal for magnetic pigments and fingerprinting
• Recommended alternatives for tension control: IRON325AT, IRON325ZV
• Screen analysis shows 97.5% particles finer than 325 mesh

Product Specifications

Metal Blocks Density Set

These Metal Blocks (Density Blocks Set of 4) are perfect for science students studying density and physical properties of metals. The set includes solid metal blocks made of copper, brass, iron, and aluminum, which can be used for teaching, measuring, and comparing density. The blocks are identified by physical properties such as color, weight, and attraction to magnet, making them ideal for comparing other physical properties such as hardness and sound. They are durable and can last for many years and experiments if maintained with care.

Key Features

• Blocks of same size (13 x 13 x 50 milimeters).
• Compare weight to determine lower density.
• Identified by physical properties such as color, weight, and attraction to magnet.
• Copper (redish color), Brass (yellow color), Iron (heavy and attracted to magnet), Aluminum (light and not attracted to magnet).
• May also be used to compare other physical properties such as hardness and sound.
• Durable and can last for many years and experiments if maintained with care.

Product Specifications:

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Sorbic Acid

Sorbic acid is a white, crystalline powder with a slightly acidic taste. It is widely used as a preservative in food and cosmetics industries to prevent the growth of molds, yeasts, and fungi. With its effectiveness against various microorganisms, sorbic acid finds application in baked goods, cheese, and wine products. It is particularly favored for its organoleptic neutrality, safety, and efficacy in low moisture foods like cheeses and bakery items.

Key Features:

• Powerful preservative for food and cosmetics
• Effective against molds, yeasts, and fungi
• Organoleptic neutrality
• Safe for consumption
• Preferred for low moisture foods

Product Specifications:

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Caution: Sorbic acid is generally safe for consumption when used according to good manufacturing practices. However, individuals with specific allergies or sensitivities should exercise caution and consult a healthcare professional if necessary.