Betaine anhydrous grades are separated less by chemical identity than by the documentation and impurity limits attached to them: feed-grade material, which accounts for most of the volume traded into Southeast Asia, is typically supplied at a minimum 98% assay against a supplier specification, while food-grade material is requested against Food Chemicals Codex (FCC) or an equivalent food-additive monograph, and personal-care material is specified on INCI identity plus a cosmetic-grade impurity profile. All three are the same compound — trimethylglycine, CAS 107-43-7 — so the buying decision is about which paperwork the destination application requires, not which molecule you receive.
What Betaine Anhydrous Is
Betaine anhydrous, also called trimethylglycine, is a white to off-white crystalline powder that is highly soluble in water and distinctly hygroscopic. It is produced either by extraction from sugar beet molasses, which yields a naturally sourced material, or by chemical synthesis; both routes reach comparable assay levels, and the difference matters mainly for labelling claims and for buyers who need a natural-origin declaration. The anhydrous form is distinguished from betaine hydrochloride, a separate article of commerce with different handling and pH behaviour that should never be substituted without a formulation review.
Betaine Anhydrous Grades and the Standards Behind Them
Selecting among betaine anhydrous grades starts with the end use. Animal-nutrition buyers generally work to a supplier specification with a stated minimum assay, moisture ceiling and heavy-metal limits, since feed material is regulated regionally rather than by a single global monograph. Food and beverage formulators request FCC or an equivalent food-additive specification, which adds identity testing and defined limits on residual solvents and microbiological criteria. Personal-care formulators specify the INCI name and a cosmetic-grade impurity profile, and will often ask for a statement on the production route because origin claims flow through to finished-product labelling.
| Grade | Typical Standard | Typical Assay | Primary Industry |
|---|---|---|---|
| Feed grade | Supplier specification, regional feed regulation | ≥98% | Poultry, swine and aquaculture nutrition |
| Food grade | FCC / food-additive specification | ≥98% | Beverages, sports and functional nutrition |
| Cosmetic grade | INCI identity, cosmetic impurity profile | ≥98% | Personal care and household formulation |
Physical Forms and Packaging
Betaine anhydrous is supplied predominantly as a free-flowing crystalline powder, with granular and fine-milled options available where dry-blend flow or dissolution rate is the constraint. Standard commercial packaging is 25 kg multi-wall paper or PP/PE bags on pallets; bulk bags are available for high-volume feed buyers. Because the material picks up ambient moisture readily, bags intended for extended storage are commonly supplied with an inner polyethylene liner, and buyers running humid warehouses should confirm the liner specification rather than assume it.
Applications by Industry
In animal nutrition, betaine anhydrous functions as an osmolyte and a methyl donor in feed formulation, and is dosed into poultry, swine and aquaculture rations at inclusion rates set by the feed formulator. In food and beverage manufacturing it is used as a functional ingredient in sports and specialised nutrition formats, where its high water solubility makes it straightforward to incorporate into powdered drink bases. In personal care it is used as a humectant and as a mildness additive in surfactant systems. In each case the specification tier follows the regulatory regime of the finished product, which is why a single supplier is often asked for two or three different grades.
Formulation and Processing Notes
The property that dominates handling is hygroscopicity. Betaine anhydrous will absorb atmospheric moisture and cake if left open in a humid room, so dry-blending and packing should be carried out under controlled humidity and part-used bags resealed immediately. Its high water solubility means it dissolves quickly and rarely limits a liquid formulation, but it also means that a caked lot is usually a storage failure rather than a quality failure, and can often be assessed on assay rather than rejected on appearance alone. Confirm compatibility and dosing with your own formulation trials before changing origin or grade tier.
Handling and Storage
Store in a cool, dry, well-ventilated area away from direct sunlight, with bags sealed between uses, stacked off the floor on pallets and rotated first-in-first-out. Avoid storage next to strongly odorous materials. Where a plant runs both feed-grade and food-grade material, segregate them physically and by documentation so a feed-grade lot cannot be drawn into a food line by mistake — a straightforward control that becomes hard to reconstruct after the fact if the two share a rack.
QA Documentation to Request
Ask for a lot-specific Certificate of Analysis covering assay, moisture, heavy metals and, for food and cosmetic tiers, residual solvents and microbiological criteria against the applicable standard. Request the current specification sheet, a statement of production route (beet-derived or synthetic) where an origin claim will be made downstream, allergen and GMO status for the destination market, and lot traceability back to the production batch. For regulated destinations, confirm which regional feed or food-additive listing the supplier is claiming compliance against, and check that the claim is documented rather than asserted.
Sourcing Considerations
Betaine anhydrous supply is concentrated in a small number of producing regions, and the beet-derived and synthetic routes have different feedstock exposures — beet-derived material tracks the sugar-processing season, while synthetic material tracks its own chemical feedstocks. Buyers who can qualify both routes on the same specification carry meaningfully less exposure to a single-origin disruption. Where a formulation can tolerate it, qualifying a second grade tier or a second origin ahead of need is far easier than qualifying one under pressure.
FAQ
What is the difference between betaine anhydrous and betaine hydrochloride?
They are different articles of commerce. Betaine anhydrous is the free base, supplied as a neutral crystalline powder; betaine hydrochloride is the hydrochloride salt and behaves differently on pH and handling. They are not interchangeable without a formulation review.
What assay should I specify for feed-grade betaine anhydrous?
Feed-grade material is commonly traded at a minimum 98% assay against a supplier specification, with stated moisture and heavy-metal limits. Regional feed regulation rather than a single global monograph governs the listing, so confirm the specific regime for the destination market.
Why does betaine anhydrous cake in storage?
It is hygroscopic and will absorb atmospheric moisture from an open or poorly sealed bag. Caking is usually a storage-condition issue rather than an out-of-specification lot, and assay testing will normally distinguish the two.
How DIC supports this
DIC holds betaine anhydrous regionally across grade tiers, so a manufacturer running both a feed line and a food or personal-care line can source to the right specification for each without over-specifying one to cover the other. Material requiring segregated, humidity-controlled handling moves through our pharma-grade warehouse with full lot traceability, and vendor-managed inventory arrangements are available for plants running continuous production that need replenishment planned rather than chased.
