Diethylenetriamine (DETA) segmentation by type distinguishes bulk liquid, solid, and aqueous solution forms. Bulk liquid DETA, typically supplied in drums or bulk tanks, dominates the market because it aligns with high‑volume downstream processes such as epoxy resin curing and polyurethane synthesis, where precise dosing and low impurity levels are critical. Solid DETA, offered as powder or granules, occupies a niche in specialty applications that require controlled release or solid‑state handling, for instance in certain corrosion‑inhibitor formulations. Aqueous solutions, usually 30‑50 % w/w, cater to end‑users prioritizing safety and ease of transport, especially in water‑based coating systems and small‑scale laboratory settings. The relative pricing, logistics, and regulatory considerations of each type directly affect market share: bulk liquid accounts for roughly 65 % of total revenue, solid contributes about 20 %, and aqueous solutions the remaining 15 %. Understanding these type‑based dynamics is essential for forecasting demand across geographic and regulatory environments.