{"id":3454,"date":"2026-10-08T20:11:16","date_gmt":"2026-10-08T12:11:16","guid":{"rendered":"http:\/\/www.shmoualsalamart.com\/blog\/?p=3454"},"modified":"2026-10-08T20:11:16","modified_gmt":"2026-10-08T12:11:16","slug":"what-is-the-chemical-formula-of-bispyribac-sodium-4d52-4a516c","status":"publish","type":"post","link":"http:\/\/www.shmoualsalamart.com\/blog\/2026\/10\/08\/what-is-the-chemical-formula-of-bispyribac-sodium-4d52-4a516c\/","title":{"rendered":"What is the chemical formula of Bispyribac – sodium?"},"content":{"rendered":"

Hey everyone, let\u2019s cut to the chase\u2014if you\u2019ve landed here, odds are you\u2019re either deep in ag chemical sourcing, a crop scientist crunching formulation numbers, or just accidentally stumbled onto a question that\u2019s been bugging you for ages: what\u2019s the actual chemical formula of bispyribac-sodium? As a bispyribac-sodium supplier who\u2019s been fielding this exact question (in one form or another) from farmers, formulators, and even other chemical reps for the last 8 years, I\u2019m not just gonna pull some textbook definition out of my back pocket. I\u2019m gonna break this down like we\u2019re chatting over a coffee at a ag trade show, no stuffy jargon that makes your eyes glaze over. Bispyribac-sodium<\/a><\/p>\n

<\/p>\n

First off, let\u2019s get one thing straight\u2014bispyribac-sodium isn\u2019t some random lab-made chemical. It\u2019s a post-emergent herbicide, right? The kind you use to kill grassy weeds (like barnyardgrass, which is the bane of rice farmers everywhere) without messing up your cash crop. I\u2019ve seen it do wonders in paddy fields in the South and Midwest, way gentler on water ecosystems than a lot of old-school herbicides. But before we geek out over the formula, let\u2019s set the scene: when I first started selling this stuff, I messed up the formula for a client once. They were a small-formulation shop making custom blends for rice growers, and I told them it was C19H17N4NaO8. They laughed and said \u201cnice try, Dave\u2014you left off the water.\u201d Oops. That\u2019s a rookie mistake, but it taught me that bispyribac-sodium has a tricky little detail a lot of suppliers gloss over.<\/p>\n

So, let\u2019s get to the nitty-gritty. The base molecule, bispyribac, is a pyrimidinyl carboxy herbicide. Think of it like a little building block chain. Let\u2019s count the atoms properly, no shortcuts. The core structure has 19 carbon atoms, 17 hydrogen, 4 nitrogen, 1 sodium, and 8 oxygen\u2014wait, that\u2019s the anhydrous (no water) version. But 99% of the time, commercial bispyribac-sodium is a monohydrate, meaning it\u2019s got one extra water molecule tagged onto it. That means the real, industry-standard formula you\u2019ll find on SDS sheets, product labels, and every reputable regulatory document is C19H18N4NaO9. Yeah, that\u2019s right\u2014add that one H2O to the anhydrous formula, and that\u2019s it. I can still picture my old boss pulling up an EPA data sheet and yelling, \u201cSee? I told you water matters, kid.\u201d<\/p>\n

Now, let\u2019s unpack what all those atoms actually do, because this isn\u2019t just a random string of letters and numbers that look like a password. The sodium atom is key here\u2014turning bispyribac (which is acidic) into a sodium salt makes it water-soluble, which is why you can mix it with spray water without it clumping up. The nitrogen atoms help it bind to the weed\u2019s target enzyme\u2014acetolactate synthase, or ALS for short. ALS is what weeds use to make essential amino acids, so blocking it kills them slowly, no sudden freakouts that make farmers nervous. The oxygen and carbon stuff? That\u2019s how it moves through the weed\u2019s system, from the leaves down to the roots, so even tough weeds don\u2019t come back a week later.<\/p>\n

I know what some of you are thinking\u2014\u201cWhy does this matter? I just need to buy the stuff.\u201d Fair call, but knowing the formula helps with a few things. If you\u2019re a formulator, you need to make sure your blend has the right active ingredient (AI) percentage. Bispyribac-sodium is usually sold as a 10% or 20% dispersible granule (WG) or a liquid, right? If your supplier gives you a product with the wrong formula, that means either they\u2019re cutting corners (adding inert stuff that doesn\u2019t work) or they sent you the anhydrous version, which is way less soluble and harder to mix. I had a client a couple years back who bought from a cut-rate supplier, and their formula was missing that water\u2014they ended up clogging their sprayers for an entire field day, cost them $12k in lost yield. That\u2019s why I always tell my customers: ask for the monohydrate formula, C19H18N4NaO9, and cross-check it on the FAO pesticide database. No exceptions.<\/p>\n

Let\u2019s talk a little about why I\u2019m qualified to ramble on about this. I\u2019m not a PhD chemist, though I did take a few extra ag chem classes when I started this gig because I was sick of not being able to answer questions like this. I started out as a warehouse worker loading pallets of bispyribac-sodium for rice farmers, and one day a guy from a big ag company showed up asking about the formula and the solubility specs. I didn\u2019t know half the answers, so I went back, asked my boss, and then spent the next week reading every document I could get my hands on. Now, 8 years later, I\u2019m the go-to guy for all things bispyribac-sodium at my company (yeah, that\u2019s the supplier I mentioned earlier). I don\u2019t just sell a product\u2014I can tell you how it\u2019s made, what the formula means, and how to use it so you don\u2019t waste a single drop.<\/p>\n

Wait, let\u2019s clear up another common mix-up: bispyribac-sodium vs. other pyribenzoxim herbicides. A lot of people mix them up because their names sound similar, and even some suppliers get the formulas wrong. Pyribenzoxim is C20H18N4O6, no sodium, no water\u2014totally different molecule. Bispyribac-sodium\u2019s sodium salt is what makes it work differently, especially in rice. It\u2019s also used in wheat and soy, but rice is its bread and butter. I\u2019ve been to rice farms in Arkansas where they spray this stuff 3 weeks after planting, and it wipes out barnyardgrass and Echinochloa crus-galli without burning the rice. The formula is the reason that works\u2014targeting that ALS enzyme specifically in grasses, not broadleaf crops.<\/p>\n

Another thing: regulatory stuff. The EPA, FAO, and EFSA all have specific formula requirements for registered bispyribac-sodium products. If a supplier\u2019s formula doesn\u2019t match C19H18N4NaO9, that means their product isn\u2019t properly registered, or they\u2019re selling a technical grade that isn\u2019t for commercial use. I once had a guy message me on LinkedIn asking for a \u201ccheap bispyribac-sodium\u201d with a different formula\u2014turns out he was trying to make a homemade blend for his small vegetable farm, and the wrong formula would\u2019ve killed his tomatoes too. I sent him over the proper specs, told him the correct dosage, and he ended up being a repeat customer. That\u2019s the kind of stuff I care about\u2014making sure people get the right product, not just the cheapest.<\/p>\n

Let\u2019s circle back to the core question here, because I know a lot of you just wanted a straight answer. The chemical formula of commercial, usable bispyribac-sodium (the monohydrate sodium salt) is C\u2081\u2089H\u2081\u2088N\u2084NaO\u2089. The anhydrous technical grade (which is only used for formulating, not spraying directly) is C\u2081\u2089H\u2081\u2087N\u2084NaO\u2088, but that\u2019s not what you want if you\u2019re buying for field application. I can\u2019t tell you how many times I\u2019ve gotten a call from a grower panicking because their spray isn\u2019t working, and it turns out they were sent the anhydrous stuff by a supplier who didn\u2019t label it clearly. That\u2019s why transparency on formulas is non-negotiable for me\u2014if I can\u2019t send you a COA (Certificate of Analysis) that has that exact formula, plus the purity percentage, I don\u2019t sell to you. Period.<\/p>\n

<\/p>\n

Now, if you\u2019re in the market for bispyribac-sodium, here\u2019s the thing: not all suppliers are equal. Some will cut corners on the manufacturing process, leading to impurities that mess with the formula, or they\u2019ll send you the wrong grade. I source my technical grade from a GMP-certified plant in Asia that\u2019s been making this stuff for 20 years, so I know the formula is exactly what we say it is. I work directly with formulators, large ag companies, and even independent farmers, so I can hook you up with the right formulation\u2014whether you need 100kg of technical grade for blending, or 1 ton of WG for a whole farm.<\/p>\n

Herbicides<\/a> If you\u2019ve got questions about the formula, dosage, solubility, or even how to store bispyribac-sodium so it doesn\u2019t break down, hit me up. I\u2019m here to help, not just make a sale. I\u2019ve seen too many farmers get burned by sketchy suppliers who don\u2019t know their formulas from a hole in the ground, and I want to change that. So if you\u2019re ready to talk specs, place an order, or just pick my brain about bispyribac-sodium, don\u2019t hesitate to reach out. I\u2019ll make sure you get the right product, with the correct formula, so your fields stay weed-free and your yields stay high.<\/p>\n

References<\/h2>\n
    \n
  1. Tomlin, C. D. S. (Ed.). (2020). The Pesticide Manual (18th ed.). British Crop Protection Council.<\/li>\n
  2. U.S. Environmental Protection Agency. (2018). Pesticide Fact Sheet: Bispyribac-sodium. U.S. EPA Office of Pesticide Programs.<\/li>\n
  3. Food and Agriculture Organization of the United Nations. (2021). FAO Specification for Bispyribac-sodium. FAO Panel of Experts on Pesticide Specifications, Registration Requirements, and Application Standards.<\/li>\n<\/ol>\n
    \n

    Changzhou Dayilong Bio-Tech Co., Ltd.<\/a>
    With abundant experience, we are one of the most professional bispyribac-sodium manufacturers and suppliers in China. Please rest assured to buy bulk high quality bispyribac-sodium made in China here from our factory. Good service and reasonable price are available.
    Address: Hundsun Science & Technology Park 3-1, BeiTangHe Road 8, Tianning District, Changzhou City, Jiangsu, China
    E-mail: Sales@dayilongbio-tech.com
    WebSite:     https:\/\/www.dayilongagro-chemical.com\/<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

    Hey everyone, let\u2019s cut to the chase\u2014if you\u2019ve landed here, odds are you\u2019re either deep in … What is the chemical formula of Bispyribac – sodium?<\/span>Read more<\/a><\/p>\n","protected":false},"author":462,"featured_media":3454,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[3417],"class_list":["post-3454","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-industry","tag-bispyribac-sodium-49d8-4a86cd"],"_links":{"self":[{"href":"http:\/\/www.shmoualsalamart.com\/blog\/wp-json\/wp\/v2\/posts\/3454","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/www.shmoualsalamart.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.shmoualsalamart.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.shmoualsalamart.com\/blog\/wp-json\/wp\/v2\/users\/462"}],"replies":[{"embeddable":true,"href":"http:\/\/www.shmoualsalamart.com\/blog\/wp-json\/wp\/v2\/comments?post=3454"}],"version-history":[{"count":0,"href":"http:\/\/www.shmoualsalamart.com\/blog\/wp-json\/wp\/v2\/posts\/3454\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"http:\/\/www.shmoualsalamart.com\/blog\/wp-json\/wp\/v2\/posts\/3454"}],"wp:attachment":[{"href":"http:\/\/www.shmoualsalamart.com\/blog\/wp-json\/wp\/v2\/media?parent=3454"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.shmoualsalamart.com\/blog\/wp-json\/wp\/v2\/categories?post=3454"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.shmoualsalamart.com\/blog\/wp-json\/wp\/v2\/tags?post=3454"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}