Both tofu (soy residue) and cassava (tapioca fiber) are plant-based, flushable, biodegradable cat litter substrates — and both are real alternatives to bentonite for the right buyer. The two substrates are not interchangeable, though: their water-absorption curves, clumping profiles, fragrance behavior, and cost-per-ton all differ in ways that matter for a B2B cat litter manufacturer program. This side-by-side is what we send procurement teams when they ask.
Side-by-side specification table
| Parameter | 豆腐猫砂 | Cassava cat litter | Edge |
|---|---|---|---|
| Raw material | Soybean residue (food-grade by-product, ≥ 95 %) | Cassava / tapioca fiber (natural plant starch) | Tofu (food-grade) |
| Granule | 1.5 mm round stick · length 10–30 mm | 1–2 mm particle | Tofu (longer granule) |
| Color | Natural off-white / cream / pale yellow | Milky white / cream / pale yellow | Tie |
| Density | 0.45–0.60 kg/L (lightweight) | 0.75–0.88 kg/L (medium) | Tofu (lighter, easier to ship) |
| Dust content | < 3.0 % | < 0.5 % (lower-dust grade) | Cassava (cleaner) |
| Water absorption | > 600 % | > 650 % | Tie |
| Clumping speed | 3 seconds | 3 seconds | Tie |
| Clumping strength | 290–480 g/cm² | 290–480 g/cm² | Tie |
| 水に流せる | Yes — small clumps, running water | Yes — small clumps, running water | Tie |
| Biodegradability (OECD 301B) | 92–98 % | 92–98 % | Tie |
| Stock fragrances | 4 (Original · Green Tea · Lavender · Charcoal) | 5 (Original · Peach · Green Tea · Lavender · Charcoal) | Tie |
| pH | 6.5–7.5 (cat-safe) | 6.0–8.5 | Tofu (cat-safe band) |
| Compostability | Yes (industrial composting) | Yes (industrial composting) | Tie |
| Container load (20GP) | ≈ 18 MT | ≈ 18–22 MT | Cassava (denser = more per box) |
| MOQ | 18 MT (1 × 20GP) | 1 × 20GP | Tie |
| Lead time | Within 20 days from deposit | Within 20 days from deposit | Tie |
| Heavy-metal spec (SGS) | Lead ≤ 5 · Arsenic ≤ 2 · Cadmium ≤ 1 mg/kg | Lead ≤ 5 · Arsenic ≤ 2 mg/kg | Tie |
When tofu cat litter wins
EU and Australia
Both markets have flush-friendly sewage systems and rising demand for biodegradable cat litter. Tofu is the market default for these regions.
Long-haul shipments
Lower density (0.45–0.60 kg/L) means lighter per-ton shipping weight — air-freight and small-parcel programs favour tofu.
Kittens, seniors, sensitive cats
pH 6.5–7.5 sits inside the cat-safe band; the soybean-residue input has a faint natural scent that sensitive cats tolerate.
When cassava cat litter wins
Tropical markets
Higher humidity tolerance and lower dust make cassava the fastest-growing plant-based substrate in Southeast Asia and Brazil.
Buyers prioritising dust
Cassava ships at < 0.5 % dust vs. tofu at < 3 %. For households with allergy-prone cats or owners, dust is the deciding factor.
Container load efficiency
Higher density = more tons per 20-foot box. For FOB Dalian buyers shipping to long-haul destinations, the cost-per-ton math tilts toward cassava.
The five fragrance options buyers actually ask about
Both substrates share an aroma problem: they have a faint natural scent (soy / starchy plant) that buyers either love or want to mask. PY-PET ships stock fragrances plus custom fragrance development for orders ≥ 1 × 20GP.
| Aroma profile | Tofu | Cassava | Notes |
|---|---|---|---|
| Original (light natural) | ✓ | ✓ | Mild, lets the substrate’s natural scent come through |
| Green Tea | ✓ | ✓ | Clean, calming, the highest-volume stock fragrance in both |
| Lavender | ✓ | ✓ | Stronger masking, preferred in hotter climates |
| Charcoal (activated) | ✓ | ✓ | Deodorising, the strongest odour-control option |
| Peach | — | ✓ | Cassava only, sweet / fresh profile for tropical markets |
Cost-per-ton reality (2026)
FOB Dalian pricing for tofu vs cassava is within ± 8 % of each other on a per-ton basis — the bigger cost driver is pack size and fragrance, not substrate. For a real comparison, see the how to compare wholesale cat litter quotes.
Cassava is typically 4–7 % cheaper per ton because the raw input (cassava fiber) is denser and processes in less line-time. Tofu carries a small premium because the soybean-residue supply chain is more tightly regulated and food-grade.
How PY-PET runs both substrates
| Production detail | Tofu | Cassava |
|---|---|---|
| Production line | Dedicated tofu line at Aisha-Pet | Dedicated cassava line at Aisha-Pet |
| Substrate-segregated? | Yes (no cross-contamination) | Yes |
| Compounding partner | In-house (food-grade soy residue) | In-house (natural cassava fiber) |
| Lead time | Within 20 days from deposit | Within 20 days from deposit |
| Trial order | 2-ton minimum | 2-ton minimum |
| Free sample | 1 kg (freight collect) | 1 kg (freight collect) |
