Frozen Whole Onions
Description
Technical Parameters
Frozen Whole Onion Search Intent Becomes a Purchase Specification
"Frozen whole onions"can mean pearl onions for foodservice, standard whole peeled bulbs for processing, whole red onions, or even chilled peeled onions. We separate these products at quotation so the buyer receives the correct diameter, thermal treatment, texture expectation and packing plan.
Pearl / Type II
10–22 mm whole peeled bulbs for foodservice, ready-meal components and portion-controlled packs. The size definition prevents a quotation for ordinary large onions.
Type I Whole
22–48 mm whole stemmed and peeled bulbs. We control shape, root crown, sprout, peel, blemish, mechanical damage and diameter distribution.
Red or White/Yellow
Color is a product identity, not a loose preference. We write the color type, approved sample and permitted poor-color units into the order standard.
Unblanched or Blanched
Our standard quotation states the actual pretreatment. Blanching changes flavor, texture and microbiological expectations and is never assumed from the word IQF.
Buyer Risks and GreenLand-food Controls
| Buyer concern | Order risk | Our control | Buyer evidence |
|---|---|---|---|
| Wrong diameter | Uneven heating, count and presentation | We define 10–22, 20–40 or 22–48 mm and set undersize/oversize tolerances. | Approved sample and size inspection |
| Peel, roots or sprouts | Extra trimming, tough pieces and complaints | We inspect peel, root crown, core material, seed stems and EVM against numeric limits. | Grade record and batch check |
| Weak or excessive pungency | Formula and flavor inconsistency | We define low, medium or high pungency and test pyruvic acid when requested. | COA Actual Result in µmol/g FW |
| Soft, crushed or clumped bulbs | Poor usable yield and dosing | We control mechanical damage, character, IQF separation and cold-chain condition. | Pre-shipment appearance and temperature record |
| Unclear heat treatment | Wrong texture, flavor or safety assumption | The specification states unblanched or blanched and identifies intended further heat processing. | Signed process description |
| Incomplete QA file | Delayed import or factory release | We list COA, micro, pesticide, heavy-metal, origin and traceability requirements in the order. | Batch and shipment document package |
Actual white onion washing and transfer: remaining peel, roots, dirt and damaged bulbs can be removed before freezing.
Whole Onion Styles and Diameter Bands
Type II / Pearl, 10–22 mm: small whole peeled bulbs with a tighter count and presentation requirement. The lot-average style tolerance starts at no more than 10% below 10 mm and 5% above 22 mm.
Commercial small whole, 20–40 mm: a practical foodservice and ready-meal range used when the buyer wants larger pieces than pearl onions but narrower variation than a broad whole grade.
Type I, 22–48 mm: the recognized whole-style range. The lot-average style tolerance starts at no more than 10% below 22 mm and 5% above 48 mm.
A large-bulb project outside 48 mm is quoted as an order-specific "other"style with its own diameter, shape, freeze condition and application trial. We do not label an undefined 50–60 mm bulb as standard Type I.
Red and White/Yellow Whole Onion Evidence
Color type, bulb shape and processing behavior vary by crop. We keep the actual product and the associated grade next to each other instead of using an unrelated vegetable image as factory evidence.
Original red onion production image: root, neck, loose layers and blemished bulbs are handled before freezing.
Close inspection view of whole red onions; this supports product-specific trimming rather than a generic factory claim.
Whole frozen red onions in a liner show the buyer the expected bulk appearance, frost and natural color range.
Commercial Specification: IQF Frozen Whole Onions
The table is a quotation basis for a detailed product specification. The signed contract defines the order limits; the COA records actual results for the corresponding production batch.
| Product | IQF Frozen Whole Onions / Whole Peeled Frozen Onions / Frozen Pearl Onions |
|---|---|
| Botanical name / ingredient | Allium cepa L.; 100% onion for the standard unseasoned product |
| Color type | Red onion or white/yellow onion, not mixed unless a mixed-color order is expressly specified |
| Origin / season | Fujian, China; principal processing season February–June, with frozen inventory planned for year-round supply |
| Whole styles | Pearl / Type II 10–22 mm; commercial small whole 20–40 mm; Type I 22–48 mm |
| Processing | Stemmed, peeled, washed, trimmed, inspected, IQF frozen, graded and packed; standard unblanched or blanched by signed order |
| Grade | Grade A whole-style framework or Selected Grade with tighter order limits |
| Appearance | Characteristic color, substantially free-flowing, whole and well shaped, without objectionable dirt, grit, off-odor or off-flavor |
| Brix / pH | Commercial reference 6–10°Bx and pH 5.0–6.0; actual crop-batch results when included in the COA |
| Pungency / pyruvic acid | Low 0–3, medium 3–7, high >7 µmol/g fresh weight; target and Actual Result by order |
| Bulk packing | 1 × 10 kg food-grade blue PE liner in export carton; other bulk weights by order |
| Retail / foodservice packing | 300 g, 500 g, 900 g, 1 kg and 2.5 kg bags; plain, labelled or printed private-label film |
| Shelf life / storage | 24 months from production at −18°C or below; avoid thawing and refreezing |
| MOQ | Normally one 20 ft frozen container or a workable mixed-container plan; printed-film MOQ is quoted separately |
| Loading reference | Approximately 23–25 metric tons per 40 ft reefer without pallets; final load depends on carton, pallet, airflow and legal weight |
| Lead time | Normally 15–21 days after product, packing, artwork, document plan and order schedule are fixed |
| Trade / loading port | FOB, CFR or CIF; Xiamen or another agreed China loading port according to stock and route |
| Intended use | Commercial ingredient intended for further preparation and heat processing; not represented as a validated ready-to-eat item |
Grade A Whole Onion Defect Limits
For whole style, a practical grade check uses 50 bulbs per sample unit. The values below provide a recognized Grade A purchasing language. A Selected Grade can use the tighter limits shown when the crop, sample and price are aligned.
| Defect | Selected Grade starting limit | Grade A tolerance | Commercial effect |
|---|---|---|---|
| Dark green units | 0 per 50 units | ≤1% | Controls visually objectionable green striping |
| Poor-color units | ≤2% | ≤5% | Protects color identity and pack uniformity |
| Major blemish | ≤1% | ≤2% | Limits dark or extensive injury |
| Total blemish | ≤2% | ≤5% | Controls aggregate minor and major marks |
| Mechanical damage | ≤1% | ≤2% | Limits crushed, broken and deeply gouged bulbs |
| Major core material | 0 per 50 units | ≤1% | Controls tough root crown, sprouts and seed stems over 10 mm |
| Total core material | ≤1% | ≤2% | Protects edible yield and texture |
| Peel | ≤1% | ≤2% | Reduces tough papery tissue in processing |
| Reasonably good character | ≤1% | ≤2% | Limits weak firmness and spongy texture |
| Poor character | 0 per 50 units | ≤1% | Controls soft or mushy bulbs |
| Extraneous vegetable material | Absent | ≤1% | Controls roots, leaves and harmless plant matter |
| Grit, dirt and foreign material | Absent | Absent where appearance or edibility is affected | Food-safety and complaint control |
Original white onion process image: washing, visual inspection and controlled transfer precede the freeze stage.
Processing Flow and Control Records
1. Raw onion intake: we record source lot and inspect firmness, sprouting, decay, dirt, size and color. Soft, heavily sprouted or diseased bulbs are removed.
2. Peeling, stemming and root trimming: outer skin, neck, roots and damaged layers are removed. Trimming is controlled so excessive cutting does not reduce whole-bulb yield.
3. Washing and inspection: bulbs pass through washing and visual sorting. We inspect remaining peel, EVM, dirt, blemish, poor color and shape.
4. Pretreatment: the order states unblanched or blanched. Time and temperature records apply when blanching is part of the agreed process.
5. IQF freezing and grading: bulbs are frozen individually, screened by diameter and checked for free-flowing condition, mechanical damage and clumps.
6. Packing and release: we check liner, net weight, carton, code, seal, metal-control step where applicable, frozen storage and batch documents before shipment.
Pungency, Brix and Application Matching
Brix alone does not describe onion flavor. Pyruvic acid is a more direct commercial index of pungency after onion tissue is disrupted. We can include both values when a sauce, ready meal or foodservice program needs repeatable flavor intensity.
Low pungency: 0–3 µmol/g FW
A milder profile for selected prepared dishes and programs where sharp onion heat must remain limited. Variety and crop are important; testing must be included in the order.
Medium pungency: 3–7 µmol/g FW
A balanced commercial range for soups, sauces, ready meals and industrial cooking. The actual result may be placed on the COA.
High pungency: above 7 µmol/g FW
A stronger onion flavor for formulas where intensity must remain after heating or dilution. The buyer should define an upper range if excessive sharpness creates a formulation risk.
For most whole-onion foodservice orders, diameter, grade and heat performance are the first purchasing controls. For industrial formulations, add Brix 6–10°Bx, pH 5.0–6.0 and a selected pyruvic-acid band to the specification and COA.
Microbiological, Residue and Heavy-Metal Framework
The proposed limits below are for a standard frozen vegetable ingredient intended for further heat processing. The final panel, method, sampling plan and acceptance rule follow the destination and buyer program. A ready-to-eat claim requires a separate validated process and is not inferred from freezing.
| Test item | Proposed order limit | Batch file entry |
|---|---|---|
| Aerobic plate count | ≤500,000 CFU/g | Actual Result, unit, method and lot |
| Yeast and mold | ≤10,000 CFU/g | Actual Result when included |
| Coliforms | ≤1,000 CFU/g | Actual Result |
| Escherichia coli | <10 CFU/g | Actual Result / detection level |
| Coagulase-positive Staphylococcus aureus | <100 CFU/g | Actual Result when required |
| Salmonella | Absent in 25 g | Detected / not detected |
| Listeria monocytogenes | Absent in 25 g for the proposed plan | Detected / not detected when ordered |
| Lead, EU reference | ≤0.10 mg/kg wet weight | Actual Result on agreed surveillance or batch report |
| Cadmium, EU reference | ≤0.030 mg/kg wet weight | Actual Result on agreed surveillance or batch report |
| Pesticide residues | Each active substance within destination MRL; EU default 0.01 mg/kg only where no specific MRL or statutory exception applies | Compound, LOQ, method and Actual Result on the agreed report |
COA: Limits Are Not Actual Results
We separate the signed product specification from the production-batch COA. A limit such as E. coli <10 CFU/g or cadmium ≤0.030 mg/kg states acceptance; the Actual Result column states what was measured on the identified lot.
Product, color, style, diameter, process, grade, production date, best-before date, lot and packing.
Appearance, color, odor, flavor, defects, Brix, pH, pungency and free-flowing condition as ordered.
Specification limit, Actual Result, method and unit for the agreed indicator and pathogen panel.
Conformity decision and authorized review linked with the packed and shipped batch.
Pesticide and heavy-metal testing may follow a crop-surveillance, production-batch or shipment frequency. State the destination and required frequency before quotation so the testing cost and release schedule are included.
Related Onion Cuts Are Separate SKUs
Whole onion orders are not replaced with strips or dice. When the final product will be chopped in the buyer's factory, we can compare the whole-bulb program with pre-cut IQF options and calculate preparation yield, labor and dosing needs.
Related SKU only: onion strips may be specified at 19–51 mm length and 6–19 mm width; they are not shown as whole onions.
Related SKU only: diced onion can be 6, 10 or 20 mm. Cut tolerance and broken rate require a separate specification.
10 kg Bulk, Foodservice and Private Label
The standard bulk configuration is one food-grade blue PE liner containing 10 kg net product inside an export carton. We define liner thickness and closure, carton board, carton mark, lot code, production date, best-before date and storage statement. Net-weight checks and bag/carton integrity are recorded during packing.
Foodservice and retail programs can use 300 g, 500 g, 900 g, 1 kg or 2.5 kg bags. We review bag dimensions, frozen-film suitability, sealing, product count, declared net weight, ingredient statement, preparation or intended-use wording, nutrition panel where required, origin, storage, barcode and destination language.
Printed private-label film has a separate MOQ and artwork timetable. For a first order or multi-SKU test, a plain bag with an approved label may reduce the initial print commitment. The final quotation states film, print, bags per carton and carton mark rather than using "custom packing"as an undefined promise.
Pallet and non-pallet loading are quoted separately. Pallets improve handling but reduce net container payload and change airflow. Send pallet dimensions, maximum height, stretch-wrap and corner-board requirements with the RFQ.
General export-carton loading evidence; the image supports loading-pattern discussion and is not presented as a whole-onion batch.
General company and facility document evidence. Certificate applicability and validity are reviewed for the producing site and destination; this is not an onion-batch certificate.
Documents, Certifications and Traceability
We connect the finished onion lot with raw-material intake, color/type, processing date, line, packing shift, inner packing, carton code, frozen storage and container. This gives the buyer a traceable investigation path for a size, peel, temperature or document complaint.
The standard commercial file can include invoice, packing list, bill of lading, certificate of origin and destination-required health or phytosanitary documents. The QA file can include the signed specification, batch COA, applicable facility certificate copies and the agreed microbiological, pesticide-residue or heavy-metal reports.
HACCP, ISO, BRCGS, Kosher, Halal or other certificate support is stated only for the relevant facility, product scope and valid period. Certified-organic claims require a separately certified crop and transaction documentation.
Review batch traceability and review certificate categories.
Cold Chain, Loading and Receiving Claims
We store frozen whole onions at −18°C or below and load them into a reefer according to the agreed carton and pallet plan. A 40 ft non-palletized reference is approximately 23–25 metric tons. The booking, container payload, airflow, route and destination limits determine the final figure.
General cold-storage evidence for frozen export handling; it is not described as a dedicated whole-onion warehouse.
Check carton count, lot marks, frozen condition, container cleanliness, set point and shipment documents.
Record seal, container condition, representative product temperature, cartons, inner bags, frost, clumps and lot codes before unloading.
Retain reefer data, time-stamped photos, temperature method, sample locations and affected quantity. Separate the lot and avoid repeated thaw/refreeze cycles.
Application Matching by Buyer Channel
Foodservice and Catering
Pearl 10–22 mm or small 20–40 mm onions reduce peeling and portion work. We match bag weight, bulb count, heat performance and whole-piece appearance.
Ready Meals and Meal Components
Diameter, character and mechanical damage affect appearance after processing. State the cooking process and finished-piece requirement in the RFQ.
Soups, Sauces and Stews
Whole or small onions provide visible pieces, while pungency determines flavor contribution. Add pyruvic acid and Brix only when formula consistency requires them.
Industrial Further Processing
When the buyer will cut or puree the bulbs, grade, peel, core material, microbiology and yield may matter more than narrow visual calibration. We quote the economically relevant grade.
Retail and Private Label
Selected color and tighter whole-bulb grade improve visible pack consistency. We coordinate artwork, barcode, legal text, bag, carton and pallet as one approval sequence.
Mixed Vegetable Container
We can combine compatible frozen items when MOQ, carton dimensions, loading sequence, documents and destination requirements form a workable reefer plan.
Frozen Whole Onions FAQ
1. What qualifies as a frozen whole onion?
It is a whole, stemmed and peeled onion bulb that is washed, prepared and frozen. Dice, strips, rings and wedges are separate styles and require separate specifications.
2. What is the difference between Type I and pearl onions?
Type I whole onions measure 22–48 mm. Type II or pearl onions measure 10–22 mm and normally serve applications needing smaller count-controlled bulbs.
3. Can you supply a 20–40 mm commercial range?
Yes. We can quote 20–40 mm as a commercial whole-onion specification with its own undersize, oversize and shape tolerances.
4. Are red and white whole onions interchangeable?
No. Color, flavor, pungency and visual result differ. We state red or white/yellow onion on the quotation, sample, specification, carton mark and COA.
5. Are the onions blanched?
The standard offer states unblanched or blanched explicitly. Do not infer blanching from IQF; the pretreatment is selected for the buyer's flavor, texture and process requirement.
6. How is whole-onion Grade A measured?
A whole-style check uses 50 bulbs per sample unit and evaluates color, blemishes, mechanical damage, core material, peel, character and EVM against numeric tolerances.
7. Can pungency be specified?
Yes. Pyruvic acid can define low 0–3, medium 3–7 or high above 7 µmol/g fresh weight. The order sets the band and the COA shows the batch Actual Result.
8. What microbiological results can appear on the COA?
The agreed panel can include APC, yeast and mold, coliforms, E. coli, S. aureus, Salmonella and Listeria monocytogenes, with limit, Actual Result, unit and method.
9. Do you provide pesticide and heavy-metal reports?
Yes, according to destination law and the agreed crop, batch or shipment frequency. Reports list compounds or metals, methods, LOQs and actual results without unsupported absolute claims.
10. What is the standard bulk packing?
The standard proposal is one 10 kg blue food-grade PE liner in an export carton. We also quote smaller foodservice and private-label bags.
11. Can you produce private-label packs?
Yes. We review film, bag size, artwork, ingredient and storage text, barcode, date and lot coding, carton marks, language and destination requirements.
12. What are the MOQ and lead time?
The normal MOQ is one 20 ft frozen container or a workable mixed-container plan. Lead time is normally 15–21 days after the complete product and packing plan is fixed.
13. What is the shelf life and storage temperature?
Shelf life is 24 months from production at −18°C or below. Continuous frozen handling protects separation, carton condition and the agreed product state.
14. What information is needed for a precise quotation?
Send color, diameter, Grade A or Selected Grade, blanching status, pungency, defects, packing, quantity, destination, application, reports, pallet plan and delivery date.
Send a Complete Frozen Whole Onion RFQ
Send your onion color, 10–22 / 20–40 / 22–48 mm diameter, Grade A or Selected Grade, unblanched or blanched process, Brix/pH/pungency requirement, defect tolerances, microbiological and chemical report plan, 10 kg or retail packing, private-label status, quantity, pallet need, destination port, trade term and target delivery date.
We will prepare one measurable product, packing, document and shipment standard for sample approval and repeat orders.
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