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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:
| Chemical Structure | [Na5P3O10]n |
| Synonyms | Sodium triphosphate; Triphosphoric acid, pentasodium salt; Sodium Phosphate Tripoly; STPP; pentasodium triphosphate; Pentasodium Tripolyphosphate |
| Grade | Food (FCC) Grade, Granular, medium density, Kosher |
| Uses | Water softening, sequestering, peptizing or deflocculating agent. May also be used for detergents, soaps, and ceramics. |
| CAS # | [7758-29-4][Na5O10P3]n |
Similar Products:
- TripoClean - Advanced Water Softening Agent
- DetergoMax - Premium Detergent Builder
- Preservitex - Effective Food Preservative
- MoistureLock - Food Emulsifier and Moisture Retainer
- ChelaGuard - Powerful Chelating Agent for Industrial Use
Note: These are similar products, and each product is different, so research is required to find the best fit for your needs.
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.
Perfect for detergent manufacturers, food producers, and industries seeking versatile water softeners, preservatives, and chelating agents.
Carbon Electrode - Graphite Rod
Our Carbon Electrode - Graphite Rod is a highly conductive cylindrical graphite block, for forming electric arcs or as an electrode in basic electrolysis experiments. With a diameter of 10mm and a length of 100mm, this electrode is for students conducting experiments requiring a carbon electrode. The high conductivity and low density of the graphite material make it an choice for various applications.
Product Specifications
| Material | Graphite |
| Diameter | 10mm |
| Length | 100mm |
| Conductivity | High |
| Packaging | Single Pack, Pack of 10, Pack of 100 |
Applications and Benefits:
- for students conducting experiments requiring a carbon electrode
- Suitable for forming electric arcs or as an electrode in basic electrolysis experiments
- for experiments that require a highly conductive cylindrical graphite block
Key Features and Benefits
- Highly conductive graphite material
- Low density for performance
- 10mm diameter and 100mm length for precise applications
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.
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
| Materials Included: | Iron, Aluminum, Zinc, Lead, Brass, Copper |
| Dimensions: | 10mm metal cubes |
Similar Products
- Alloy Composition Sampler
- Physics Density Kit
- Educational Metallurgy Set
- Solid Metal Blocks Collection
- Miniature Metals Reference Kit
Note: These are similar products, and each product is different, so research is required to find the best fit for your needs.
Caution: Handle with care due to sharp edges. Not suitable for children without supervision.
Perfect for Science Enthusiasts, Collectors, Students in Metal Studies
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
| Material | Rubber, Acrylic, Plastic, Softwood, Hardwood |
| Size | Each cube 20mm |
| Quantity | 5 cubes |
| Application | Educational, Material Science |
Similar Products
- Transparent acrylic 20mm cube set
- Educational rubber cube collection, 20mm
- Mixed hardwood cube set, 20mm size
- Plastic cube assortment for teaching, 20mm
- Softwood sample cube kit, 20mm
Note: These are similar products, and each product is different, so research is required to find the best fit for your needs.
Perfect for Science educators and teachers, Students in physical or materials science, Homeschooling parents for science lessons, Material science hobbyists, Science museum educational departments
Iron Powder, Super Fine, Light
Super fine high-purity elemental iron powder with irregular, porous sponge-like particles. Manufactured using high-temperature metallurgical reduction processes with hydrogen gas. This powder is low density, non-flowing, and suitable for various applications.
Product Specifications
| Iron Content | >97.7% |
| Acid Insolubility | 0.90% |
| H2-Loss | 1.75% |
| Apparent Density (HALL) | Low <2.2 g/cm3 |
| Particle Size Distribution | -100 Mesh: 100% +200 Mesh: 0.1% +325 Mesh: 2.4% -325 Mesh: 97.5% |
| HTS Number | 7205.21.0000 |
| CAS Number | 7439-89-6 |
Applications and Benefits:
- Cold casting / resin casting
- Metal clay
- Magnetic pigment
- Fingerprinting powder
- Making magnetic paints
- Magnetic powder for tension control devices
Additional Information:
This product is no longer in production. Limited quantities available. Please consider IRON325AT or IRON325ZV for alternative solutions. For further details, visit:
Metal Blocks (Density Blocks Set Of 4)
This set of four solid metal blocks—copper, brass, iron, and aluminum—provides a consistent 13 × 13 × 50 mm specimen for precise density, magnetic and material‑identification investigations. The blocks are color‑coded and together weigh 234 g, enabling repeatable measurements in physics, chemistry and materials‑science laboratories.
Product Specifications
| Material | Copper, Brass, Iron, Aluminum |
| Dimensions | 13 × 13 × 50 mm (millimeters) |
| Weight | Total set weight 234 g (individual masses vary by metal) |
| Packaging | Set of 4 blocks |
| Model/Part Number | P61010 |
| SKU | P61010 |
| Magnetic Property | Iron block attracted to magnet; aluminum block non‑magnetic |
| Color Identification | Copper – reddish; Brass – yellow; Iron – dark gray; Aluminum – light gray |
Applications and Benefits:
- Measure and compare the density of different metals using identical dimensions.
- Demonstrate magnetic properties by testing iron versus non‑magnetic aluminum.
- Explore additional physical characteristics such as hardness, acoustic response, and thermal conductivity.
- Support hands‑on laboratory exercises in physics, chemistry, and materials‑science curricula.
Key Features and Benefits
- Uniform size (13 × 13 × 50 mm) ensures consistent volume for accurate density calculations.
- Four distinct metals provide a clear contrast in mass and magnetic behavior.
- Durable solid construction allows repeated use over many years.
- Color‑coded identification simplifies visual sorting and rapid setup.
Caution:
Handle with care as metal blocks may cause injury if mishandled or dropped. Keep away from small children and pets.
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