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DC Calcium Carbonate Granular from Oyster Shell
Specification: DC Calcium Carbonate Granular from Oyster Shell
Hs Code: 2836500000
CAS Number: 471-34-1
packaging: 25kg/bag
MOQ: 1000kg
Qty in 20’fcl: 16tons
Description
DC Calcium Carbonate Granular from Oyster Shell is a natural calcium source granulated from purified oyster shell. It is a grey, irregular granular powder that carries the mineral profile of marine shell, offering a naturally sourced alternative to limestone-derived calcium carbonate. The granular form is engineered for direct-compression tableting, with the flow and compressibility needed for high-speed production of calcium supplements. As a natural marine mineral, it appeals to brands positioning around natural, sustainable sourcing and supports bone health with the same calcium chemistry the body recognizes. Produced under strict food-grade controls with tight limits on heavy metals and microbiology, it delivers a traceable, naturally derived calcium option with a two-year shelf life. The marine origin also carries a naturally balanced trace mineral profile. It is produced under strict food-grade controls with a two-year shelf life. The granulation is engineered for direct compression, delivering steady tablet weight and hardness at high press speeds. In practice the granules compress into natural-positioned calcium tablets with steady hardness, and their marine origin gives marketing teams a traceable sourcing story for labels and packaging. Consistent batch-to-batch quality is maintained through defined raw-material sourcing and in-process control, protecting formula stability for industrial buyers. How oyster-shell calcium works: purified oyster shell is composed almost entirely of calcium carbonate, carrying the same mineral chemistry as limestone sources but with a natural marine origin story. The shell is cleaned, purified and granulated into direct-compression granules that flow and press like engineered DC grades, so brands gain the marketing story without sacrificing production performance. Practical guidance: direct-compress natural-positioned calcium tablets; build bone-health supplements marketed on marine sourcing; fortify cereals and powdered beverages with natural calcium; use it in pet nutrition calcium products; and pair it with vitamin D for complete bone support. Quality assurance: produced under strict food-grade controls with calcium content, heavy metals including lead, arsenic, cadmium and mercury, and microbiology tested per batch, with documentation supplied. Packed in 25 kg bags with a two-year shelf life. For brands competing in the natural supplement space, oyster-shell calcium offers a traceable, sustainable story at mainstream cost. Specification highlights: it is packed in 25kg/bag with a minimum order quantity of 1000kg. Certificates of analysis accompany every shipment, and sample supply, specification customization and flexible payment terms are available for qualified buyers, supported by the standardized seven-step service process from inquiry to after-sales support. Compliance and quality at a glance: the product is manufactured under the standards referenced in its specification sheet, and every batch is tested for identity, purity, heavy metals and microbiology before release. Batch records, test reports and certificates are kept and supplied for buyer qualification, audit and regulatory filing, and the product is stored and shipped in its original packaging to preserve quality through the supply chain. For industrial buyers, this documented quality system means one qualification covers years of consistent supply, with the specification sheet serving as the contractual reference for every delivery.
Applications
It is used in natural calcium tablets and bone-health supplements, especially brands emphasizing marine or natural sourcing. Multivitamin and mineral tablets use it as a direct-compression calcium source, and food fortification adds it to cereals and powdered beverages. It also serves as a natural calcium ingredient in pet nutrition.
Advantages
The oyster-shell origin gives brands a genuinely natural, traceable story that synthetic or quarry-sourced calcium cannot match, at a comparable cost. Its granulated form flows and compresses reliably on high-speed presses, so no reformulation effort is needed to switch sources. Strict purity controls, a two-year shelf life and steady supply make it an easy upgrade for natural-positioned calcium products.
Specifications
| Product Name | Calcium Carbonate Granular DC(Oyster shell) | ||||
| Batch No. | SWGKM24001 | ||||
| Test date | 20240701 | ||||
| Mfg date | 20240701 | ||||
| Exp date | 20260630 | ||||
| Description | Grey Irregular Granular | ||||
| Item | Specification | Results | |||
| Identification | Pass A, B | Pass A, B | |||
| Calcium | % | ≥36.0 | 37.4 | ||
| Calcium Carbonate | % | ≥90.0 | 93.7 | ||
| Loss on drying | % | ≤2.0 | 0.5 | ||
| Heavy metals | ppm | ≤20 | <20 | ||
| Lead | ppm | ≤3 | 0.11 | ||
| Mercury | ppm | ≤0.5 | 0.006 | ||
| Arsenic | ppm | ≤1 | 0.28 | ||
| Cadmium | ppm | ≤2 | 0.017 | ||
| Through 16 Mesh | % | 100 | 100 | ||
| On 60 Mesh | % | ≤75 | 68.5 | ||
| Under 200 Mesh | % | ≤25 | 10.5 | ||
| Total aerobic count | Cfu/g | ≤1000 | <10 | ||
| Molds&Yeasts | Cfu/g | ≤100 | <10 | ||
| E.coli | Cfu/g | ≤10 | <10 | ||
| Staphylococcus Aureus | /25g | Negative | Negative | ||
| Salmonella | /5g | Negative | Negative | ||
| Conclusion | Meet the specifications | ||||
| Checker |  |
Inspector |
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FAQ
Q1 : Do you provide samples? is it free or extra?
Yes, we could offer the sample for free charge but do not pay the cost of freight.
Q2 : Do you accept customization?
We can produce according to your indicators.For specific details, please consult
Q3 : How long is your delivery time?
Generally it is 5-10 days if the goods are in stock. or it is 15-20 days if the goods are not in stock.
Q4 : What is your payment terms?
T/T, L/C, Credit Card, PayPal, Cash.
Accepted Payment Currency:USD,EUR,JPY,CAD,AUD,HKD,GBP,CNY,CHF;
Q5 : How do you ship the products?
By Sea ,By Air ,By courier, Fedex, UPS Etc. It is up to you.
Q6 : What’s the MOQ?
Different products result in different MOQ
For specific details, please consult
What's the order process?
1) Inquiry --- Share your initial requirements with us; we will establish a communication channel and learn about your needs and background.
2) Requirement Alignment --- We discuss technical parameters, application scenarios and regulatory requirements in depth to define the details and delivery standards.
3) Product Confirmation & Quotation --- We provide compliant product options and a detailed quotation covering specifications, pricing and minimum order quantity.
4) Order Processing & Payment Plan --- Contract terms are confirmed and flexible payment arrangements are made, keeping every transaction safe and compliant.
5) Shipping Plan --- We select the optimal shipping route and coordinate customs clearance and insurance to ensure your cargo is dispatched safely and on time.
6) Inspection & Tracking --- We provide quality inspection reports and full logistics tracking, keeping product quality controlled and the shipment fully transparent.
7) After-sales Service --- Technical support, prompt issue response and continuous improvement suggestions build a long-term partnership and ensure your satisfaction.
