Cat Litter Comparison Matrix: Six Materials, Ten Procurement Metrics

Lisa Wei, Export Director · Jinan Silk Pet · Updated September 15, 2026

Definition. A cat litter comparison matrix puts every commercial base — bentonite, tofu, cassava, silica gel, wood pellet and custom blends — side by side on the ten numbers importers actually buy on: raw material, loose density, clumping, dust, absorption, moisture, flushability, container loading, MOQ and best market fit. Density is the anchor metric: it decides tonnes per container and therefore freight cost per kilogram.

Buyers ask "which cat litter is best". The honest answer is a matrix, not a single winner: each material wins a different procurement scenario. This page is the comparison our export team uses in quotations, built from batch reports, third-party lab data (CTI) and factory tests. Figures are verified ranges, not marketing numbers — the sources are listed at the bottom of each section.

The Full Matrix: 6 Materials × 10 Metrics

Metric	Bentonite	Tofu	Cassava	Silica Gel	Wood Pellet	Custom Blend
Raw material	Sodium bentonite clay (own mine)	Pea fibre + plant starch	Cassava starch, soy-free	Amorphous silica gel, 1–8 mm	Compressed softwood pellets	2–3 bases + functional additives
Loose density (g/L)	~950 (range 900–1,050)	597 (CTI batch)	600–650 (per batch)	~750 (factory TDS reference)	550–700	570–720 (recipe-dependent)
Clumping	≤3 s, hardest clump	≤5 s	≤4 s	No clump (absorbs inside)	No clump (compressed pellet)	≥30–32 N clump strength
Dust content	≤0.1% (ISO 8130 sieving)	≤0.05%	≤0.05% (5-stage air-jet)	≤0.05% after sieving	Low fines after dedusting	≤0.05%–0.3% by tier
Absorption	≥280% of own weight	≥320%	300%+ (gravimetric)	Absorbs into crystal, 2–4 weeks/bag	Moderate — pellet structure	Hybrid of components
Moisture at loading	<8% (mineral, verify per COA)	<8% (anti-mold)	≤8% oven-dry @105°C	Low (inorganic)	Batch-dependent, specify	≤8–12% by destination climate
Flushable	✗ No	✓ Yes	✗ Not recommended	✗ No	✗ No	✓ Partial (plant-based recipes)
Container loading	~26 t / 20GP (weight-limited)	~18 t / 20GP (volume-limited)	~18 t / 20GP (volume-limited)	~38 t / 40HQ	~17–21 t / 20GP	~18 t / 20GP per SKU
MOQ	26 t (1×20GP)	18 t / SKU	18 t / SKU	38 t (1×40HQ)	By container	18 t / SKU, mixed loads possible
Best market fit	GCC, LATAM, high-volume value lines	Korea, Japan, EU flushable premium	EU, North America — soy-free premium	Single-cat, odor-first households	Eco-positioned, wood-preferring markets	JP/KR/EU multi-SKU private label

Density figures: bentonite ~950 g/L (factory internal test), tofu 597 g/L (CTI third-party batch report), cassava 600–650 g/L (TDS, per batch), silica gel and wood pellet ranges per product pages. Moisture and dust specs are per-batch COA values, not guarantees of a single production run.

Density Is the Metric That Decides Your Freight Cost

Loose bulk density (g/L) is the first number to fix because it determines tonnes per container, and therefore the freight cost per kilogram you pay on every order. Two litters can look identical on a shelf and ship at completely different economics:

• Bentonite at ~950 g/L fills a 20GP to about 26 tonnes — but it is weight-limited: the container reaches its weight ceiling before it is full. Port weight caps (e.g. Hamad ~20.8 t per 20GP) change this math and must be checked per destination.
• Tofu at 597 g/L and cassava at 600–650 g/L load about 18 tonnes per 20GP — volume-limited, because the bags fill the box before the weight limit is reached. You are paying freight on air.
• Silica gel is quoted in a different unit entirely: 38 t per 40HQ, the standard MOQ for crystal lines.

For a worked example of the arithmetic — including why a 5-litre bag holds ~4.75 kg of bentonite but only ~3 kg of tofu — see liters vs kilograms. For the underlying verified ranges and the container-loading tables behind them, see the bulk density reference and the TDS & specs hub.

Which Material Wins Which Procurement Scenario

Your scenario	Recommended base	Why
First container, best cost per kg	Bentonite	Lowest cost base + ~26 t per 20GP = lowest freight per kg; hardest clump (≤3 s)
Flushable premium line (KR/JP/EU)	Tofu	Flushable, ≤0.05% dust, CTI batch data supports retail claims
Soy-free / allergen-aware positioning	Cassava	100% soy-free, 300%+ absorption, naturally white granules
Odor-first, single-cat households	Silica gel	25–30 day odor control, no clump, low dust; 38 t per 40HQ
Eco-positioned, wood-accepting market	Wood pellet	550–700 g/L, natural look and scent; loads under port weight caps
Multi-SKU test with one MOQ	Custom blend	2–3 bases dosed ±2%, mixed 20ft container combines SKUs

If you are building a private label program across several of these lines, the sequencing that works best is: one material for your hero SKU, a blend or a mixed container for the range — see private label & OEM and the profit-margin comparison for the unit economics behind each choice.

Where the Numbers Come From

• CTI third-party report (tofu): 597 g/L loose density, clumping rate 96.1%, disintegration time 41 s, odor removal 99.2% — an independent lab report we can share under NDA.
• Factory internal tests (bentonite, cassava): bentonite ~950 g/L reference density; cassava 600–650 g/L with oven-dry moisture at 105°C.
• Batch COA (all lines): moisture, dust sieving results and microbiological checks are issued per production batch, not as a single evergreen figure.
• Product TDS: full specification sheets per line are collected in the TDS & specs hub.

We state ranges, not single promises, because density and dust genuinely vary by batch, particle size, moisture and test method. Any supplier quoting one exact number with no method is telling you less than they appear to.

Three Mistakes Importers Make With These Numbers

1. "Higher density is always better." Density only helps until it hits a limit — bentonite becomes weight-limited at ~26 t per 20GP, and some ports (Hamad ~20.8 t) cap it lower. Past that point, extra density is dead weight you still pay freight on.
2. "A 30 L bag weighs the same across materials." At ~0.95 kg/L a 30 L bentonite bag holds ~28 kg; the same bag of tofu (597 g/L) holds ~18 kg. Retail specs written in litres hide a 10 kg swing that customers feel at the door.
3. "Plant-based is automatically lighter and cheaper to ship." Plant-based lines ship ~18 t per 20GP — volume-limited — so the per-kg freight is higher than bentonite, even though each bag is lighter. Cheap per bag ≠ cheap per tonne delivered.

Frequently Asked Questions

Which cat litter material is cheapest per kilogram?

Bentonite. It has the lowest base cost per kg and its high density (~950 g/L) lets a 20GP load ~26 tonnes — the strongest freight economics in the category. Plant-based litters cost more per kg and load ~18 t per 20GP because the container hits its volume limit first.

Which material loads the most tonnes per container?

Bentonite loads ~26 t per 20GP (weight-limited, and inside port caps). Cassava and tofu load ~18 t per 20GP (volume-limited). Silica gel is quoted per 40HQ: ~38 t, because its low bulk density fills the box before the weight limit.

Tofu vs cassava cat litter — which should I choose?

Tofu (597 g/L, CTI batch report) is denser and clumps in about 5 seconds. Cassava (600–650 g/L) absorbs 300%+ of its weight and clumps in about 4 seconds with a firmer granule. Choose tofu for flushable, low-dust premium lines; choose cassava for soy-free, allergen-aware positioning.

When does a custom blend beat a single material?

When you need a performance or price point no single base delivers — e.g. 58% cassava / 42% tofu at ~0.58 kg/L for a mid-density flushable premium SKU, or a 15% silica addition for faster odor control. Blends are gravimetrically dosed to ±2% and batch-tested at five points to prevent segregation.

Which material suits hot, humid GCC markets?

Bentonite dominates GCC import volumes for cost and availability, but moisture control is the deciding spec: demand ≤8% at loading with a stated test method, and prefer mineral bases for long sea legs. Plant-based lines need moisture-barrier packaging. Check port weight caps (e.g. Hamad ~20.8 t per 20GP) before finalising the loading plan.

What data should I request before choosing a supplier's material?

Ask for: (1) loose bulk density in g/L with the test method, (2) clumping time or clump strength (N), (3) dust percentage with the sieving method, (4) moisture at loading (target ≤8%), (5) absorption as % of own weight, and (6) container loading in tonnes per 20GP or 40HQ. Batch COA plus a third-party report where possible is the strongest evidence.