Melamine Monoclonal Antibody & Hapten-BSA Conjugate for Dairy, Infant Formula & Pet Food Adulteration Screening
A melamine antibody is a monoclonal antibody raised against melamine — a nitrogen-rich industrial chemical used in the manufacture of plastics, laminates, and resins — conjugated to a carrier protein (BSA) to produce a hapten immunogen suitable for hybridoma antibody generation. Melamine has no legitimate role as a food ingredient; its relevance to food safety testing arises entirely from its history of illegal use as a protein-content adulterant. Standard protein quantification methods, most notably the Kjeldahl method, measure total nitrogen content in a sample and apply a fixed conversion factor to estimate protein content — a method that cannot distinguish nitrogen contributed by genuine milk or wheat protein from nitrogen contributed by an added adulterant. Because melamine is inexpensive and extremely nitrogen-dense (66% nitrogen by mass), adding it to diluted or substandard milk, formula, or protein concentrate allowed unscrupulous producers to make a fraudulently low-protein product appear compliant on paper. Melamine antibodies, used in competitive ELISA and lateral flow (LFA) immunoassay formats, detect melamine directly and independently of the flawed Kjeldahl nitrogen proxy, closing this specific fraud vector.
Melamine testing became a permanent fixture of global food safety programs following the 2008 Chinese infant formula scandal, in which melamine was deliberately added to infant formula and liquid milk to mask protein dilution. The contamination caused tens of thousands of infants to develop kidney stones and other renal damage, with a number of associated infant deaths — melamine and its metabolite cyanuric acid crystallize together into insoluble compounds that accumulate in the kidneys, a risk especially acute for infants who consume formula as their sole nutrition source. A related but separate 2007 incident involved melamine-adulterated wheat gluten and protein concentrates exported for use in pet food, causing widespread pet kidney failure in North America. Together, these two incidents established melamine as a standard, mandatory screening target for dairy, infant formula, and imported protein ingredient supply chains worldwide — testing requirements that remain in force today. China's GB 2762 national food safety standard sets a strict maximum limit for melamine in food, with a stricter limit for infant formula (1 mg/kg) than for other food categories (2.5 mg/kg), directly reflecting the lessons of the 2008 incident.
Sekbio's melamine antibody and matching melamine-BSA conjugate achieve IC50 of 2 ppb, ELISA detection sensitivity of 1 ppb, and colloidal-gold lateral flow test-strip sensitivity of 10–20 ppb — sensitivity well below the GB 2762 regulatory limits, expressed in parts-per-billion terms relative to the milligram-per-kilogram thresholds. A notable analytical feature of this antibody is its cross-reactivity with cyromazine at greater than 90%. Cyromazine is a triazine-class agricultural insecticide that metabolizes into melamine in plant and animal tissue; rather than being a specificity flaw, this cross-reactivity means a single melamine antibody-based assay can flag both deliberate melamine adulteration and cyromazine-related agricultural residue contamination within one screening test, giving food safety laboratories broader risk coverage from a single reagent.
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A single dedicated reagent pair covering melamine adulteration screening and cyromazine-related residue detection across dairy, infant formula, and protein ingredient matrices.
| Reagent | IC50 | ELISA Sensitivity | LFA Sensitivity | Key Cross-reactivity | Price (1mg) |
|---|---|---|---|---|---|
| Melamine Monoclonal Antibody | 2 ppb | 1 ppb | 10–20 ppb | Cyromazine >90% | $895.52/mg |
| Melamine-BSA Conjugate | 2 ppb | 1 ppb | 10–20 ppb | Cyromazine >90% | $895.52/mg |
IC50 and sensitivity values from COA release testing in competitive ELISA format. Prices are reference list prices per 1 mg of monoclonal antibody or matching melamine-BSA conjugate; OEM bulk-scale pricing for 10 mg to gram quantities is quoted on request. Contact info@sekbio.com for full performance data and OEM supply pricing.
Sub-ppb-sensitivity melamine detection with intentional cyromazine cross-reactivity, purpose-built for the dairy and infant formula matrices with the highest historical adulteration risk.
Sekbio's melamine antibody achieves ELISA sensitivity of 1 ppb and IC50 of 2 ppb, providing substantial margin below China's GB 2762 regulatory limits for melamine in food (1 mg/kg for infant formula; 2.5 mg/kg for other foods). This sensitivity supports both rapid screening and quantitative compliance testing for dairy processors, infant formula manufacturers, and import inspection laboratories that must demonstrate melamine levels well within regulatory thresholds.
Cross-reactivity with cyromazine of greater than 90% means Sekbio's melamine antibody detects two distinct food safety risks within a single assay: deliberate melamine adulteration for protein-content fraud, and cyromazine-derived melamine residue from legitimate agricultural insecticide use. This dual coverage is a practical advantage for laboratories screening agricultural and animal-derived products where either contamination pathway is plausible, without requiring two separate antibody reagents.
Infant formula is the highest-consequence matrix for melamine contamination, given the documented history of infant kidney damage from the 2008 scandal and the stricter GB 2762 limit (1 mg/kg) applied specifically to infant formula. Sekbio's melamine antibody and melamine-BSA conjugate support ELISA and LFA kit development calibrated for this sensitive population, enabling infant formula manufacturers and quality control laboratories to verify melamine-free status with confidence.
Sekbio's melamine antibody is validated for colloidal-gold lateral flow rapid test-strip format at 10–20 ppb sensitivity, enabling dairy processors and infant formula manufacturers to run on-site, in-plant screening without laboratory ELISA equipment. This supports high-throughput incoming raw milk and finished product testing at the speed required by continuous dairy processing operations.
Following the documented 2007 melamine-adulterated wheat gluten and protein concentrate incident, imported protein ingredients used in pet food and animal feed manufacturing remain a standard melamine screening checkpoint. Sekbio's melamine antibody supports incoming raw material testing for feed and pet food manufacturers sourcing protein concentrates from international suppliers.
MOQ 1 mg per reagent for R&D evaluation. OEM quantities from 10 mg to gram scale available for food safety kit manufacturing. Sekbio's ISO 13485-certified Shenzhen facility provides quality-assured melamine antibody production with lot COA documentation, serving dairy processors, infant formula manufacturers, and import/export testing laboratories. For broader adulteration and residue screening coverage, see our antibiotic residue antibodies and mycotoxin antibodies, or explore the full antibody catalog.
Competitive immunoassay melamine screening for the dairy, infant formula, protein ingredient, and pet food matrices with the highest documented adulteration risk.
Infant formula and milk powder remain the highest-priority matrix for melamine screening, given the direct link to infant kidney damage documented in the 2008 scandal and the stricter GB 2762 limit (1 mg/kg) applied to this category. Sekbio's melamine antibody, with ELISA sensitivity of 1 ppb, supports routine batch-release testing for infant formula manufacturers and third-party quality control laboratories verifying melamine-free compliance before product reaches retail.
Raw and pasteurized liquid milk testing for melamine addresses the same underlying fraud incentive that drove the original 2008 incident: masking protein dilution to pass nitrogen-based quality checks. Sekbio's melamine antibody supports both farm-gate raw milk collection testing and processing-plant finished product verification, using either ELISA for quantitative results or LFA for rapid on-site screening.
Imported protein concentrates and wheat gluten used in food and feed manufacturing are a standard melamine screening checkpoint since the 2007 contamination incident that caused widespread pet kidney failure in North America. Import inspection laboratories and feed/pet food manufacturers use Sekbio's melamine antibody to verify incoming protein ingredient shipments before they enter the domestic supply chain.
Pet food is both a historically implicated matrix for melamine contamination and an ongoing quality control checkpoint, since pet food manufacturers frequently source protein ingredients from the same global supply chains implicated in past adulteration incidents. Sekbio's melamine antibody enables pet food manufacturers to screen incoming raw materials and finished products, supporting brand safety assurance and regulatory compliance. Contact our team for pet food matrix extraction protocols.
Technical and commercial questions from food safety IVD developers and kit manufacturers building melamine adulteration screening assays.
A melamine antibody is a monoclonal antibody raised against melamine — a nitrogen-rich industrial chemical (used to manufacture plastics, laminates, and resins) that has been illegally added to dairy products, infant formula, and other protein-labeled foods to artificially inflate their measured protein content. Standard protein testing methods, such as the Kjeldahl method, estimate protein levels indirectly by measuring total nitrogen content and multiplying by a conversion factor — a method that cannot distinguish nitrogen from genuine milk protein from nitrogen contributed by melamine. Because melamine is cheap and nitrogen-dense, adulterating diluted or low-protein milk with melamine allowed producers to pass nitrogen-based protein tests fraudulently. Melamine antibodies are used in competitive ELISA and lateral flow (LFA) immunoassays to detect melamine directly, independent of the Kjeldahl nitrogen measurement, closing this fraud loophole.
In 2008, melamine was found to have been deliberately added to infant formula and liquid milk in China to mask protein dilution, resulting in tens of thousands of infants developing kidney stones and other renal damage, with a number of infant deaths. Melamine crystallizes with its metabolite cyanuric acid to form insoluble crystals in the kidneys, particularly dangerous in infants due to their smaller kidneys and formula-based diets. The scandal triggered a global regulatory response: countries worldwide adopted mandatory melamine testing standards for dairy and infant formula imports, and China introduced GB 2762 food safety limits for melamine in food. Melamine remains a permanent, standard screening target in dairy and infant formula quality control programs globally, more than a decade after the original incident, because the economic incentive for nitrogen-spiking fraud has not disappeared.
Yes. Sekbio's melamine antibody shows cross-reactivity with cyromazine of greater than 90%. Cyromazine is a triazine-class insecticide used in agriculture and animal husbandry (including as a pesticide in poultry litter and fly control) that metabolizes into melamine within animal and plant tissue. This high cross-reactivity is analytically useful rather than a limitation: it means a single melamine antibody-based test can flag two distinct food safety risks — deliberate melamine adulteration and residual cyromazine/melamine contamination from legitimate agricultural use — within one screening assay. Laboratories that need to distinguish the specific source of a positive result can follow up with confirmatory chromatographic methods (LC-MS/MS).
China's GB 2762 national food safety standard sets a strict maximum limit for melamine in food products, with a stricter limit applied specifically to infant formula (1 mg/kg) than to other foods (2.5 mg/kg), reflecting the heightened vulnerability of infants to melamine-related kidney damage. These limits were established as a direct regulatory response to the 2008 melamine contamination incident. Sekbio's melamine antibody, with ELISA sensitivity of 1 ppb (0.001 mg/kg) and IC50 of 2 ppb, provides substantial sensitivity margin below these GB 2762 limits, supporting both screening and quantitative compliance testing.
The food matrices historically implicated in melamine adulteration incidents, and therefore the standard testing targets for melamine screening programs, include: Infant formula and milk powder, the highest-risk matrix given the 2008 scandal and the vulnerability of infant consumers; Liquid dairy products, including raw and pasteurized milk; Protein concentrates and wheat gluten, since melamine adulteration of pet food ingredients imported for protein content was also documented as a distinct 2007 contamination incident; and Pet food, both as a historically implicated matrix and an ongoing quality control checkpoint for imported protein ingredients. Contact info@sekbio.com for matrix-specific extraction protocol recommendations.
Sekbio's melamine monoclonal antibody and its matching melamine-BSA conjugate are each priced at $895.52 per mg (reference price for R&D quantities). MOQ is 1 mg per reagent for R&D evaluation; OEM bulk-scale pricing for 10 mg to gram quantities is quoted on request for ELISA kit or LFA test-strip manufacturers. Contact info@sekbio.com for a formal quotation and current lead times.
Yes. Sekbio's melamine antibody is validated for both competitive ELISA (sensitivity 1 ppb) and colloidal-gold lateral flow rapid test-strip format (sensitivity 10–20 ppb). The LFA format enables on-site or in-plant screening for dairy processors, infant formula manufacturers, and import inspection points without requiring laboratory ELISA equipment, while the more sensitive ELISA format is used for quantitative or confirmatory testing. Contact info@sekbio.com for LFA conjugation protocols and colloidal gold particle size recommendations.
Request melamine antibody evaluation kits, hapten conjugates, or discuss OEM food safety ELISA and LFA kit development support.