{"product_id":"hanna-hi93754e-25-cod-mr-mercury-free-reagent-vials","title":"Hanna HI93754E-25 COD MR Mercury-Free Reagent Vials, 25 Vials","description":"\u003cdiv id=\"bts-hi93754e-25-description\" style=\"font-family:'Open Sans',sans-serif;font-weight:300;font-size:1rem;line-height:1.65;box-sizing:border-box;max-width:1400px;margin:0 auto;padding:20px 12px;color:#26332C;background:#fff;\"\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;align-items:center;gap:20px;padding-bottom:20px;margin-bottom:24px;border-bottom:1px solid #e0e0e0;\"\u003e\n\u003cdiv style=\"flex:1 1 360px;min-width:0;box-sizing:border-box;\"\u003e\n\u003ch4 style=\"font-family:'Open Sans',sans-serif;font-weight:300;font-size:1rem;line-height:1.65;box-sizing:border-box;font-weight:400;line-height:1.35;margin:0 0 16px;color:#245B45;\"\u003eCover the medium COD range with a chloride-free workflow.\u003c\/h4\u003e\n\u003cp style=\"font-family:'Open Sans',sans-serif;font-weight:300;font-size:1rem;line-height:1.65;box-sizing:border-box;margin:0 0 16px;\"\u003eHI93754E-25 supplies the mercury-free medium-range COD chemistry for samples expected within 0–1500 mg\/L as O2. Keep that wider concentration window separate from sample suitability: chloride must still be absent. Each pack contains 25 pre-dosed vials for a compatible, already-equipped laboratory workflow; blanking, digestion and quality-control consumption remain part of every stock plan.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cfigure style=\"flex:0 1 310px;min-width:0;margin:0;text-align:center;box-sizing:border-box;\"\u003e\n\u003cimg alt=\"Official Hanna HI93754E-25 reagent reference packaging\" height=\"1200\" loading=\"lazy\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0896\/1579\/4474\/files\/HI93754E-25_front-1200x1200-242ed9c5-e789-453a-91d2-3e03df653011__24385.1791310531.jpg?v=1793742907\" style=\"width:100%;max-width:300px;height:auto;object-fit:contain;\" width=\"1200\"\u003e\n\u003cfigcaption style=\"font-family:'Open Sans',sans-serif;font-weight:300;font-size:1rem;line-height:1.65;box-sizing:border-box;font-size:0.9rem;margin-top:8px;\"\u003eOfficial Hanna HI93754E-25 packaging reference, illustrating the refill and pre-dosed vials. Printed lot\/expiry markings are illustrative, not the lot or expiration of supplied stock.\u003c\/figcaption\u003e\u003c\/figure\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#F1F7F3;border-left:3px solid #245B45;padding:20px;box-sizing:border-box;margin:0 0 24px;\"\u003e\n\u003ch4 style=\"font-family:'Open Sans',sans-serif;font-weight:300;font-size:1rem;line-height:1.65;box-sizing:border-box;font-weight:400;line-height:1.35;margin:0 0 16px;color:#245B45;\"\u003eMatch the refill to the complete method\u003c\/h4\u003e\n\u003cp style=\"font-family:'Open Sans',sans-serif;font-weight:300;font-size:1rem;line-height:1.65;box-sizing:border-box;margin:0 0 16px;\"\u003eUse HI93754E-0 reagent in the exact-model COD MR procedure: HI97106 selects COD MR; HI83314 and HI83399 select COD MR (16). The verified range is 0–1500 mg\/L as O2. Follow the instrument’s specified vial adapter and insertion instructions for both zero and read. Official sources conflict on physical vial diameter, so this listing does not assert the diameter of supplied vials or universal adapter fit.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch4 style=\"font-family:'Open Sans',sans-serif;font-weight:300;font-size:1rem;line-height:1.65;box-sizing:border-box;font-weight:400;line-height:1.35;margin:0 0 16px;color:#245B45;\"\u003eChoose chemistry and range together\u003c\/h4\u003e\n\u003cp style=\"font-family:'Open Sans',sans-serif;font-weight:300;font-size:1rem;line-height:1.65;box-sizing:border-box;margin:0 0 16px;\"\u003eHI93754E-25 is the orderable pack; HI93754E-0 is the component code identified in the instrument method and US Safety Data Sheet. The medium-range mercury-free formulation is designed for chloride-free samples. Do not select it only because its range matches the expected number.\u003c\/p\u003e\n\u003ch4 style=\"font-family:'Open Sans',sans-serif;font-weight:300;font-size:1rem;line-height:1.65;box-sizing:border-box;font-weight:400;line-height:1.35;margin:0 0 16px;color:#245B45;\"\u003eMatch the exact instrument procedure\u003c\/h4\u003e\n\u003cp style=\"font-family:'Open Sans',sans-serif;font-weight:300;font-size:1rem;line-height:1.65;box-sizing:border-box;margin:0 0 16px;\"\u003eUse HI93754E-0 reagent in the exact-model COD MR procedure: HI97106 selects COD MR; HI83314 and HI83399 select COD MR (16). The verified range is 0–1500 mg\/L as O2. Follow the instrument’s specified vial adapter and insertion instructions for both zero and read. Official sources conflict on physical vial diameter, so this listing does not assert the diameter of supplied vials or universal adapter fit.\u003c\/p\u003e\n\u003ch4 style=\"font-family:'Open Sans',sans-serif;font-weight:300;font-size:1rem;line-height:1.65;box-sizing:border-box;font-weight:400;line-height:1.35;margin:0 0 16px;color:#245B45;\"\u003ePrepare the blank as deliberately as the sample\u003c\/h4\u003e\n\u003cp style=\"font-family:'Open Sans',sans-serif;font-weight:300;font-size:1rem;line-height:1.65;box-sizing:border-box;margin:0 0 16px;\"\u003ePrepare one vial with 2 mL sample and a separate same-lot blank vial with 2 mL deionized water. Follow the full manual’s mixing precautions, then digest at 150 °C for 120 minutes in a separate heater. Cool exactly as directed: allow the initial cooling interval, invert while still warm when instructed, then rack until room temperature without shaking or inverting during final cooling. Never place a hot vial in the photometer adapter. Zero on the blank before reading the sample.\u003c\/p\u003e\n\u003ch4 style=\"font-family:'Open Sans',sans-serif;font-weight:300;font-size:1rem;line-height:1.65;box-sizing:border-box;font-weight:400;line-height:1.35;margin:0 0 16px;color:#245B45;\"\u003eCount vials, not promised results\u003c\/h4\u003e\n\u003cp style=\"font-family:'Open Sans',sans-serif;font-weight:300;font-size:1rem;line-height:1.65;box-sizing:border-box;margin:0 0 16px;\"\u003eThe pack contains 25 actual pre-dosed vials. A reagent blank consumes one of those vials, leaving 24 sample vials when one blank is prepared for a batch. This explains the benchtop manuals’ 24-test ordering count versus the retail 25-test label. Same-lot blanks and samples are required; follow the manual’s blank-reuse rules and run a blank for each measurement set for improved accuracy. Additional blanks, QC checks, repeats or failed preparations consume more vials. There is no guarantee of 25 reportable results.\u003c\/p\u003e\n\u003ch4 style=\"font-family:'Open Sans',sans-serif;font-weight:300;font-size:1rem;line-height:1.65;box-sizing:border-box;font-weight:400;line-height:1.35;margin:0 0 16px;color:#245B45;\"\u003eCheck the matrix before interpreting COD\u003c\/h4\u003e\n\u003cp style=\"font-family:'Open Sans',sans-serif;font-weight:300;font-size:1rem;line-height:1.65;box-sizing:border-box;margin:0 0 16px;\"\u003eChloride must be absent. The HI83314 and HI83399 methods state this specifically for mercury-free reagent. Do not apply the generic 2000 mg\/L chloride threshold to this formulation, or assume a routine dilution makes a chloride-containing sample suitable. Confirm the matrix and the validated method before ordering.\u003c\/p\u003e\n\u003ch4 style=\"font-family:'Open Sans',sans-serif;font-weight:300;font-size:1rem;line-height:1.65;box-sizing:border-box;font-weight:400;line-height:1.35;margin:0 0 16px;color:#245B45;\"\u003eHave the complete digestion station ready\u003c\/h4\u003e\n\u003cp style=\"font-family:'Open Sans',sans-serif;font-weight:300;font-size:1rem;line-height:1.65;box-sizing:border-box;margin:0 0 16px;\"\u003eProvide a compatible photometer and its specified adapter, a separate digestion reactor capable of 150 °C for 120 minutes, deionized water, accurate 2 mL pipetting\/measuring tools and separate clean tips, a cooling rack, and the prescribed safety equipment. The photometer does not heat the vials. A safety shield is strongly recommended by the instrument manuals. Homogenize samples with settling solids as directed; provide the necessary equipment separately.\u003c\/p\u003e\n\u003ch4 style=\"font-family:'Open Sans',sans-serif;font-weight:300;font-size:1rem;line-height:1.65;box-sizing:border-box;font-weight:400;line-height:1.35;margin:0 0 16px;color:#245B45;\"\u003eConfirm reporting acceptance before use\u003c\/h4\u003e\n\u003cp style=\"font-family:'Open Sans',sans-serif;font-weight:300;font-size:1rem;line-height:1.65;box-sizing:border-box;margin:0 0 16px;\"\u003eThis is the mercury-free dichromate formulation, not the mercury-containing EPA reagent. Hanna cautions that a mercury-free method may not be acceptable for reporting purposes. A shared instrument-manual EPA-adaptation heading is not automatic EPA equivalence or regulatory approval. Verify acceptance with your laboratory’s SOP and reporting authority before use.\u003c\/p\u003e\n\u003ch4 style=\"font-family:'Open Sans',sans-serif;font-weight:300;font-size:1rem;line-height:1.65;box-sizing:border-box;font-weight:400;line-height:1.35;margin:0 0 16px;color:#245B45;\"\u003eHandle and ship as hazardous chemistry\u003c\/h4\u003e\n\u003cp style=\"font-family:'Open Sans',sans-serif;font-weight:300;font-size:1rem;line-height:1.65;box-sizing:border-box;margin:0 0 16px;\"\u003eMercury-free does not mean safe, nonhazardous or suitable for ordinary trash. The reagent remains strongly acidic and contains chromium chemistry; the US SDS identifies sulfuric acid, silver sulfate and potassium dichromate. Use the required PPE and ventilation, and arrange hazardous chemical waste handling. Do not pour reacted material down the drain or dispose of spent vials with ordinary trash. Hanna classifies this product as Dangerous Goods, with ground-only shipping. An SDS air-transport classification is not permission to ship by air. No dispatch date or freight quote is promised.\u003c\/p\u003e\n\u003ch4 style=\"font-family:'Open Sans',sans-serif;font-weight:300;font-size:1rem;line-height:1.65;box-sizing:border-box;font-weight:400;line-height:1.35;margin:0 0 16px;color:#245B45;\"\u003eManage received stock by its own markings\u003c\/h4\u003e\n\u003cp style=\"font-family:'Open Sans',sans-serif;font-weight:300;font-size:1rem;line-height:1.65;box-sizing:border-box;margin:0 0 16px;\"\u003eKeep unused vials in their original packaging in a cool, dark place, subject to the current SDS storage precautions. Check the lot and expiry on received stock; a reference photo does not establish your lot, expiry or available shelf life. No numeric storage temperature or shipping weight is asserted here.\u003c\/p\u003e\n\u003cdiv class=\"faq_block\" style=\"border-top:1px solid #e0e0e0;margin-top:24px;\"\u003e\u003cdiv itemscope=\"\" itemtype=\"https:\/\/schema.org\/FAQPage\" style=\"width: 100%; padding: 20px 0; font-family: 'Open Sans', sans-serif; font-weight: 300; color: #333;line-height:1.15;\"\u003e\n\u003ch3 style=\"font-size:1.1rem;font-weight:400;margin:0 0 16px;color:#245B45;\"\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cdetails itemprop=\"mainEntity\" itemscope=\"\" itemtype=\"https:\/\/schema.org\/Question\" style=\"border: 1px solid #e0e0e0; border-radius: 8px; margin: 0 0 10px 0; background: #fff;\"\u003e\u003csummary itemprop=\"name\" style=\"cursor: pointer; padding: 14px 16px; font-size: 1rem; font-weight: 400; list-style-position: inside;\"\u003eWhat does one order quantity contain?\u003c\/summary\u003e\u003cdiv itemprop=\"acceptedAnswer\" itemscope=\"\" itemtype=\"https:\/\/schema.org\/Answer\" style=\"padding: 0 16px 14px 16px;\"\u003e\u003cp itemprop=\"text\" style=\"font-size: 0.97rem; line-height: 1.6; margin: 0;\"\u003eThe pack contains 25 actual pre-dosed vials. A reagent blank consumes one of those vials, leaving 24 sample vials when one blank is prepared for a batch. This explains the benchtop manuals’ 24-test ordering count versus the retail 25-test label. Same-lot blanks and samples are required; follow the manual’s blank-reuse rules and run a blank for each measurement set for improved accuracy. Additional blanks, QC checks, repeats or failed preparations consume more vials. There is no guarantee of 25 reportable results.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails itemprop=\"mainEntity\" itemscope=\"\" itemtype=\"https:\/\/schema.org\/Question\" style=\"border: 1px solid #e0e0e0; border-radius: 8px; margin: 0 0 10px 0; background: #fff;\"\u003e\u003csummary itemprop=\"name\" style=\"cursor: pointer; padding: 14px 16px; font-size: 1rem; font-weight: 400; list-style-position: inside;\"\u003eWhich photometers and method selections are documented?\u003c\/summary\u003e\u003cdiv itemprop=\"acceptedAnswer\" itemscope=\"\" itemtype=\"https:\/\/schema.org\/Answer\" style=\"padding: 0 16px 14px 16px;\"\u003e\u003cp itemprop=\"text\" style=\"font-size: 0.97rem; line-height: 1.6; margin: 0;\"\u003eUse HI93754E-0 reagent in the exact-model COD MR procedure: HI97106 selects COD MR; HI83314 and HI83399 select COD MR (16). The verified range is 0–1500 mg\/L as O2. Follow the instrument’s specified vial adapter and insertion instructions for both zero and read. Official sources conflict on physical vial diameter, so this listing does not assert the diameter of supplied vials or universal adapter fit.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails itemprop=\"mainEntity\" itemscope=\"\" itemtype=\"https:\/\/schema.org\/Question\" style=\"border: 1px solid #e0e0e0; border-radius: 8px; margin: 0 0 10px 0; background: #fff;\"\u003e\u003csummary itemprop=\"name\" style=\"cursor: pointer; padding: 14px 16px; font-size: 1rem; font-weight: 400; list-style-position: inside;\"\u003eHow much sample and blank water do I need?\u003c\/summary\u003e\u003cdiv itemprop=\"acceptedAnswer\" itemscope=\"\" itemtype=\"https:\/\/schema.org\/Answer\" style=\"padding: 0 16px 14px 16px;\"\u003e\u003cp itemprop=\"text\" style=\"font-size: 0.97rem; line-height: 1.6; margin: 0;\"\u003ePrepare one vial with 2 mL sample and a separate same-lot blank vial with 2 mL deionized water. Follow the full manual’s mixing precautions, then digest at 150 °C for 120 minutes in a separate heater. Cool exactly as directed: allow the initial cooling interval, invert while still warm when instructed, then rack until room temperature without shaking or inverting during final cooling. Never place a hot vial in the photometer adapter. Zero on the blank before reading the sample.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails itemprop=\"mainEntity\" itemscope=\"\" itemtype=\"https:\/\/schema.org\/Question\" style=\"border: 1px solid #e0e0e0; border-radius: 8px; margin: 0 0 10px 0; background: #fff;\"\u003e\u003csummary itemprop=\"name\" style=\"cursor: pointer; padding: 14px 16px; font-size: 1rem; font-weight: 400; list-style-position: inside;\"\u003eIs a digestion heater or pipette included?\u003c\/summary\u003e\u003cdiv itemprop=\"acceptedAnswer\" itemscope=\"\" itemtype=\"https:\/\/schema.org\/Answer\" style=\"padding: 0 16px 14px 16px;\"\u003e\u003cp itemprop=\"text\" style=\"font-size: 0.97rem; line-height: 1.6; margin: 0;\"\u003eProvide a compatible photometer and its specified adapter, a separate digestion reactor capable of 150 °C for 120 minutes, deionized water, accurate 2 mL pipetting\/measuring tools and separate clean tips, a cooling rack, and the prescribed safety equipment. The photometer does not heat the vials. A safety shield is strongly recommended by the instrument manuals. Homogenize samples with settling solids as directed; provide the necessary equipment separately.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails itemprop=\"mainEntity\" itemscope=\"\" itemtype=\"https:\/\/schema.org\/Question\" style=\"border: 1px solid #e0e0e0; border-radius: 8px; margin: 0 0 10px 0; background: #fff;\"\u003e\u003csummary itemprop=\"name\" style=\"cursor: pointer; padding: 14px 16px; font-size: 1rem; font-weight: 400; list-style-position: inside;\"\u003eWhat chloride limitation applies?\u003c\/summary\u003e\u003cdiv itemprop=\"acceptedAnswer\" itemscope=\"\" itemtype=\"https:\/\/schema.org\/Answer\" style=\"padding: 0 16px 14px 16px;\"\u003e\u003cp itemprop=\"text\" style=\"font-size: 0.97rem; line-height: 1.6; margin: 0;\"\u003eChloride must be absent. The HI83314 and HI83399 methods state this specifically for mercury-free reagent. Do not apply the generic 2000 mg\/L chloride threshold to this formulation, or assume a routine dilution makes a chloride-containing sample suitable. Confirm the matrix and the validated method before ordering.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails itemprop=\"mainEntity\" itemscope=\"\" itemtype=\"https:\/\/schema.org\/Question\" style=\"border: 1px solid #e0e0e0; border-radius: 8px; margin: 0 0 10px 0; background: #fff;\"\u003e\u003csummary itemprop=\"name\" style=\"cursor: pointer; padding: 14px 16px; font-size: 1rem; font-weight: 400; list-style-position: inside;\"\u003eCan I use this for regulated reporting?\u003c\/summary\u003e\u003cdiv itemprop=\"acceptedAnswer\" itemscope=\"\" itemtype=\"https:\/\/schema.org\/Answer\" style=\"padding: 0 16px 14px 16px;\"\u003e\u003cp itemprop=\"text\" style=\"font-size: 0.97rem; line-height: 1.6; margin: 0;\"\u003eThis is the mercury-free dichromate formulation, not the mercury-containing EPA reagent. Hanna cautions that a mercury-free method may not be acceptable for reporting purposes. A shared instrument-manual EPA-adaptation heading is not automatic EPA equivalence or regulatory approval. Verify acceptance with your laboratory’s SOP and reporting authority before use.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails itemprop=\"mainEntity\" itemscope=\"\" itemtype=\"https:\/\/schema.org\/Question\" style=\"border: 1px solid #e0e0e0; border-radius: 8px; margin: 0 0 10px 0; background: #fff;\"\u003e\u003csummary itemprop=\"name\" style=\"cursor: pointer; padding: 14px 16px; font-size: 1rem; font-weight: 400; list-style-position: inside;\"\u003eIs this reagent nonhazardous or mercury-free?\u003c\/summary\u003e\u003cdiv itemprop=\"acceptedAnswer\" itemscope=\"\" itemtype=\"https:\/\/schema.org\/Answer\" style=\"padding: 0 16px 14px 16px;\"\u003e\u003cp itemprop=\"text\" style=\"font-size: 0.97rem; line-height: 1.6; margin: 0;\"\u003eMercury-free does not mean safe, nonhazardous or suitable for ordinary trash. The reagent remains strongly acidic and contains chromium chemistry; the US SDS identifies sulfuric acid, silver sulfate and potassium dichromate. Use the required PPE and ventilation, and arrange hazardous chemical waste handling. Do not pour reacted material down the drain or dispose of spent vials with ordinary trash.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails itemprop=\"mainEntity\" itemscope=\"\" itemtype=\"https:\/\/schema.org\/Question\" style=\"border: 1px solid #e0e0e0; border-radius: 8px; margin: 0 0 10px 0; background: #fff;\"\u003e\u003csummary itemprop=\"name\" style=\"cursor: pointer; padding: 14px 16px; font-size: 1rem; font-weight: 400; list-style-position: inside;\"\u003eWhat shipping and storage precautions apply?\u003c\/summary\u003e\u003cdiv itemprop=\"acceptedAnswer\" itemscope=\"\" itemtype=\"https:\/\/schema.org\/Answer\" style=\"padding: 0 16px 14px 16px;\"\u003e\u003cp itemprop=\"text\" style=\"font-size: 0.97rem; line-height: 1.6; margin: 0;\"\u003eDangerous Goods: ground-only shipping. No air-shipping permission or delivery date is promised. Store unused vials in their original packaging in a cool, dark place and follow the current SDS. Inspect actual lot\/expiry markings on receipt; printed dates in photographs are illustrative only.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\n\u003c\/div\u003e\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Hanna Instruments","offers":[{"title":"Default Title","offer_id":53443700883754,"sku":"BTS-HI93754E-25","price":69.29,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0896\/1579\/4474\/files\/HI93754E-25_front-1200x1200-242ed9c5-e789-453a-91d2-3e03df653011__24385.1791310531.jpg?v=1793742907","url":"https:\/\/bluetigerscientific.com\/products\/hanna-hi93754e-25-cod-mr-mercury-free-reagent-vials","provider":"Blue Tiger Scientific","version":"1.0","type":"link"}