## Common ground
All options are types of cat litter or related products used for odor control and waste management in cat litter boxes.
## Options at a glance
**1104.29 – Barley-based**
- **Defining trait:** Made from processed barley grains, typically biodegradable and clumping.
- **Typical examples:** Clumping litter from barley husks.
- **Best fit when:** Using plant-based, eco-friendly, or grain-derived litter.
**1108.12 – Corn starch**
- **Defining trait:** Derived from corn, often forms clumps and is biodegradable.
- **Typical examples:** Clumping corn-based litter.
- **Best fit when:** Choosing a renewable, plant-based, low-dust option.
**1108.14 – Manioc (cassava) starch**
- **Defining trait:** Made from cassava root, similar to corn but from tropical tuber.
- **Typical examples:** Eco-friendly clumping litter from cassava.
- **Best fit when:** Using tropical plant-based materials with high absorbency.
**1404.90 – Other vegetable products**
- **Defining trait:** Not specified by a single source; includes any non-corn, non-barley, non-cassava plant material.
- **Typical examples:** Litter from wood pulp, coconut coir, or other agricultural byproducts.
- **Best fit when:** The base is a general vegetable-derived material not covered elsewhere.
**2508.10 – Natural bentonite clay**
- **Defining trait:** Made from naturally occurring clay that swells and clumps when wet.
- **Typical examples:** Traditional clumping clay litter (e.g., Arm & Hammer).
- **Best fit when:** Using standard, effective, widely available clay-based litter.
**2512.00 – Diatomite**
- **Defining trait:** Made from fossilized diatoms; highly absorbent and lightweight.
- **Typical examples:** Natural mineral-based litter with good odor control.
- **Best fit when:** Seeking a porous, natural mineral alternative to clay.
**2811.22 – Silicon dioxide / silica gel**
- **Defining trait:** Highly absorbent, often used in non-clumping, granular form.
- **Typical examples:** Silica gel crystals that trap moisture and odor.
- **Best fit when:** Using low-dust, highly absorbent, non-clumping litter.
**3307.90 – Deodorisers**
- **Defining trait:** Not litter itself, but a product added to reduce smell.
- **Typical examples:** Scented sprays, odor-neutralizing powders.
- **Best fit when:** Supplementing existing litter with scent or odor control.
**3802.10 – Activated carbon**
- **Defining trait:** Used for adsorbing odors; not a primary litter base.
- **Typical examples:** Carbon pellets or sachets added to litter boxes.
- **Best fit when:** Targeting strong odor elimination, not waste management.
**3824.99 – Mixed bentonite clay**
- **Defining trait:** Blend of bentonite with other materials (e.g., additives).
- **Typical examples:** Enhanced clay litters with added fragrance or absorbency.
- **Best fit when:** Using a blended, multi-component clay product.
**3824.99 – Colloidal silica with cobalt salts**
- **Defining trait:** Silica gel with moisture indicators (cobalt salts change color).
- **Typical examples:** Smart litter that shows wetness via color change.
- **Best fit when:** Using a high-tech, visual-detection litter system.
**6815.99 – Natural calcium carbonate**
- **Defining trait:** Made from limestone or chalk; often non-clumping and low-dust.
- **Typical examples:** Mineral-based, eco-friendly litter with mild odor control.
- **Best fit when:** Using a natural, alkaline mineral base for pH balance.
## Key differences
| Option | Base Material | Clumping? | Primary Use | Special Feature |
|-------|----------------|-----------|-------------|-----------------|
| 1104.29 | Barley | Yes | Waste management | Plant-based |
| 1108.12 | Corn starch | Yes | Waste management | Renewable |
| 1108.14 | Cassava starch | Yes | Waste management | Tropical origin |
| 1404.90 | Other veg. | Varies | Waste management | General category |
| 2508.10 | Bentonite clay | Yes | Waste management | Standard clumping |
| 2512.00 | Diatomite | No | Absorption | Lightweight, porous |
| 2811.22 | Silica gel | No | Odor control | High absorbency |
| 3307.90 | N/A | N/A | Odor suppression | Additive only |
| 3802.10 | Activated carbon | N/A | Odor elimination | Adsorption |
| 3824.99 (mixed) | Clay blend | Yes | Waste management | Enhanced formula |
| 3824.99 (cobalt) | Silica + cobalt | No | Visual monitoring | Color-changing |
## How to choose
- Is the litter made from clay? → 2508.10 or 3824.99 (mixed)
- Is it silica gel with color indicators? → 3824.99 (cobalt)
- Is it plant-based (barley, corn, cassava)? → 1104.29, 1108.12, or 1108.14
- Is it a general vegetable product not listed? → 1404.90
- Is it mineral-based but not clay (e.g., diatomite, calcium carbonate)? → 2512.00 or 6815.99
- Is it only for odor control (not waste management)? → 3307.90 or 3802.10
## Overlaps & pitfalls
- **Overlaps:** Some products may be both clay-based and mixed (e.g., bentonite + additives), so priority should go to the **main functional material**.
- **Pitfalls:** "Deodorisers" (3307.90, 3802.10) are not litter themselves—confusing them with base materials is a common error.
- **No clear priority rule:** If multiple traits apply, choose based on the product’s **primary function** (e.g., waste management vs. odor control)