A calcium carbonate powder made in Japan from 100% scallop shell. The shells are washed, sterilised, dried and milled, never calcined, giving a white powder with 38-40% calcium that passes 635 mesh. For calcium fortification of foods and supplements; MOQ 20 kg.
Tell us what you are developing and which documents you need. We reply from Japan within one working day with the product specification, SDS and the CoA of the current lot.
The producer's process chart runs in 16 steps from raw shell to labelled bag. Shells are washed, cleared of metal and foreign matter, sterilised in boiling water, dried and milled with air classification to 635 mesh. The hottest step is the dryer, with an inlet temperature of 210 °C; calcium carbonate itself decomposes only at about 825 °C.
Step 1 · raw material
Scallop shell 100%, Japan
Step 2 · drum scrubber and trommel
Shells cleaned before inspection
Step 3 · magnet 37.5 mT or more
Visual check for foreign matter by operators
Step 4 · 95 °C or more, 30 min or more
Sterilisation tank
Step 5 · dryer inlet 210 °C
Dried, not calcined
Step 6 · vertical mill and separator
To 635 mesh fineness
Step 7 · alcohol 0.1-1.0% v/w
Lumps broken up through a 0.8 mm screen
Step 8 · 20 kg bags
Magnet 800 mT or more, filled to 20.00-20.20 kg, sealed and sewn, metal detector Fe and SUS 2.5 mm
The grade on this page. Other grades, where available, are specified on request.
Example lot values are published in the developer's guide below. They are an example, not a specification; your lot's CoA governs.
A Japanese trading company selling directly to brand owners and contract manufacturers. No distributor layer between you and the documents.
Every shipment travels with the Certificate of Analysis of its own lot, with the measured values and the full safety panel.
A small first order lets you run a pilot batch before committing to bulk. Larger volumes are quoted by volume and delivery terms.
For registered companies developing a product. Tell us the format you plan and we will say honestly what to expect.
After payment is received. Freight quoted on request. Specification and SDS before you order, CoA with the goods.
If you are comparing ingredients for a new SKU, these questions separate one material from another quickly.
The producer declares none of Japan's 28 listed allergens, but scallop is a mollusc. Australia lists mollusc as a mandatory allergen declaration; check how your label rules treat shell-derived calcium.
The process includes an alcohol spray at 0.1-1.0% (v/w), and a halal certificate is not part of the current document set. For supplements in the UAE this decides whether the ingredient can be used.
Scallop shell is of animal origin. The ingredient does not fit a vegan claim.
The powder is practically insoluble in water (about 14 mg/L). Drinks need a suspension system; tablets, capsules and powder blends do not.
Calcium carbonate reacts with acids and releases carbon dioxide. Plan for it in acidic drinks, effervescent tablets and acidified foods.
The specification is 38-40% calcium. Formulate on the 38% minimum and let the lot CoA confirm each batch.
What each component is, what the processing changes, and what published research on the raw material has examined. No health claims; references on request.
Shell calcium comes in two forms. Calcined shell calcium is fired until the calcium carbonate breaks down into calcium oxide. Non-calcinated shell calcium is cleaned, sterilised, dried and milled, and stays calcium carbonate. This powder is the second kind: 100% scallop shell from Japan, 38-40% calcium, milled so that at least 99% passes 635 mesh.
In Japan it is a food additive used for calcium fortification of processed foods under the Food Sanitation Act. For export buyers it is a marine-origin calcium carbonate raw material, documented by a specification and an SDS, with the producer testing every lot.
The producer packs the powder in 20 kg kraft paper bags with a polyethylene liner. We sell from one bag, 20 kg, at 14 USD/kg; larger volumes are quoted by volume and freight is quoted on request. Shelf life is 2 years from production.
This section describes the material and the nutrient, not effects of this product. Sources are listed at the end.
Scallop shells such as those of the Japanese scallop, Patinopecten (Mizuhopecten) yessoensis, are built mostly of a foliated layer of calcite, the stable crystal form of calcium carbonate. The mineral is laid down on a small organic matrix of acidic glycoproteins that controls crystal growth [1]. That matrix is why a shell powder still shows a trace of protein: 0.4 g per 100 g in the producer's nutrition analysis, against 39.3 g of calcium.
Heat changes shell chemistry. Calcium carbonate decomposes at about 825 °C and releases carbon dioxide (SDS of this product). In a published study, scallop shell calcined at 1,000 °C was converted completely to calcium oxide and calcium hydroxide, and the calcined powder was studied as an antibacterial filler for biodegradable packaging plastics [2]. Calcined shell calcium is therefore a different material: a strong alkali that is handled differently. This powder is non-calcinated, its hottest process step is a 210 °C dryer inlet, and it is offered as a calcium source, not as an antibacterial agent.
The following summarises the calcium fact sheet of the US National Institutes of Health Office of Dietary Supplements [3]. It describes the nutrient, not this product.
Shell calcium is chemically calcium carbonate (CAS 471-34-1), the same substance as ground limestone or precipitated calcium carbonate. What differs between sources is the raw material, the trace composition and the processing history. For that reason a formulator compares lots on the specification: calcium content, heavy metals, arsenic, microbiology and particle size, all listed on this page.
Other calcium sources in our catalogue: Sesame Mineral Powder (Plant-Based Calcium), a water-soluble plant mineral in lactate form, and Akoya Pearl Powder, non-calcined nacre. Also in our range: Fish Collagen Tripeptide.
Start at the minimum order. Free sample. Specification, SDS and lot CoA on request.
Request a sample or quotationShell calcium comes in two forms. Calcined shell calcium is fired until the calcium carbonate breaks down into calcium oxide. Non-calcinated shell calcium is cleaned, sterilised, dried and milled, and stays calcium carbonate. This powder is the second kind: 100% scallop shell from Japan, 38-40% calcium, milled so that at least 99% passes 635 mesh.
In Japan it is a food additive used for calcium fortification of processed foods under the Food Sanitation Act. For export buyers it is a marine-origin calcium carbonate raw material, documented by a specification and an SDS, with the producer testing every lot.
The producer packs the powder in 20 kg kraft paper bags with a polyethylene liner. We sell from one bag, 20 kg, at 14 USD/kg; larger volumes are quoted by volume and freight is quoted on request. Shelf life is 2 years from production.
This section describes the material and the nutrient, not effects of this product. Sources are listed at the end.
Scallop shells such as those of the Japanese scallop, Patinopecten (Mizuhopecten) yessoensis, are built mostly of a foliated layer of calcite, the stable crystal form of calcium carbonate. The mineral is laid down on a small organic matrix of acidic glycoproteins that controls crystal growth [1]. That matrix is why a shell powder still shows a trace of protein: 0.4 g per 100 g in the producer's nutrition analysis, against 39.3 g of calcium.
Heat changes shell chemistry. Calcium carbonate decomposes at about 825 °C and releases carbon dioxide (SDS of this product). In a published study, scallop shell calcined at 1,000 °C was converted completely to calcium oxide and calcium hydroxide, and the calcined powder was studied as an antibacterial filler for biodegradable packaging plastics [2]. Calcined shell calcium is therefore a different material: a strong alkali that is handled differently. This powder is non-calcinated, its hottest process step is a 210 °C dryer inlet, and it is offered as a calcium source, not as an antibacterial agent.
The following summarises the calcium fact sheet of the US National Institutes of Health Office of Dietary Supplements [3]. It describes the nutrient, not this product.
Shell calcium is chemically calcium carbonate (CAS 471-34-1), the same substance as ground limestone or precipitated calcium carbonate. What differs between sources is the raw material, the trace composition and the processing history. For that reason a formulator compares lots on the specification: calcium content, heavy metals, arsenic, microbiology and particle size, all listed on this page.
Other calcium sources in our catalogue: Sesame Mineral Powder (Plant-Based Calcium), a water-soluble plant mineral in lactate form, and Akoya Pearl Powder, non-calcined nacre. Also in our range: Fish Collagen Tripeptide.
It is a calcium carbonate powder made from scallop shell that has been washed, sterilised in boiling water, dried and milled, but not fired. Calcined shell calcium is heated until the carbonate breaks down into calcium oxide; this powder skips that step and stays calcium carbonate, at 95% or more. Calcium content is 38-40%, pH 8.5-10.5 in a 10-fold dilution. It is made in Japan from 100% scallop shell.
1 g delivers 380-400 mg of calcium, from the 38-40% specification; the producer's nutrition analysis example shows 39.3 g of calcium per 100 g. A label target of 300 mg calcium needs about 0.75-0.8 g of powder before excipients. Formulate on the 38% minimum and confirm with the lot CoA.
Iizuka Shoukai supplies scallop shell calcium powder at 14 USD/kg for the 20 kg minimum order, which is one 20 kg kraft bag as packed by the producer. Larger orders are quoted by volume and freight is quoted on request. Ships from Japan 1-1.5 weeks after payment. Payment is 100% prepayment by SWIFT or Stripe. Free 100 g evaluation samples are available for registered companies. We also offer OEM finished-product manufacturing in capsules, sticks and tablets at our Tomioka Plant in Gunma.
Calcined shell calcium is fired until the carbonate decomposes into calcium oxide, which forms calcium hydroxide with water; it is strongly alkaline and handled differently. This powder is non-calcinated: its hottest process step is a 210 °C dryer, so it remains calcium carbonate. Chemically it is the same substance as limestone or precipitated calcium carbonate; what differs is the marine raw material, the processing and the lot specification: heavy metals max. 5 ppm, arsenic max. 2 ppm, total plate count max. 300 CFU/g.
