Iron phosphate is the pet-safe, organic alternative to metaldehyde for slug and snail control. When slugs eat the bait, iron phosphate disrupts their calcium metabolism, causing them to stop feeding immediately. They die within 3-6 days. Safe around dogs, cats, children, and wildlife.
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Classification
Molluscicide (Organic Approved)
EPA Signal Word
Caution
Mode of Action
Disrupts calcium metabolism in mollusks — causes feeding cessation and death
Excellent safety profile — one of the safest pesticides available. Safe around pets, children, and wildlife. Any unused bait simply breaks down into iron and phosphate, which are soil nutrients. OMRI listed for organic gardening.
✅ Pet owners: Unlike metaldehyde baits (which can kill dogs), iron phosphate baits are safe if your dog eats them. Dogs may get mild GI upset from eating large quantities of the bait carrier, but the iron phosphate itself is non-toxic to mammals.
Example
0.5 oz
per gallon
⚗️ Mixing Calculator
Enter your sprayer size and target rate — get the exact amount to pour. Backpack, hand sprayer, hose-end, or skid unit.
Application: Scatter pellets evenly around plants at dusk (when slugs become active). Use 1 lb per 1,000 sq ft. Reapply after heavy rain. Most effective when applied in a ring around target plants.
Pro tip: Apply in late afternoon/early evening for best results. Slugs feed at night and will encounter fresh bait. Water the area lightly before application — slugs are more active in moist conditions.
Combination approach: Pair iron phosphate bait with copper tape barriers around raised beds for maximum slug protection.
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💡 Slug/snail bait. Extremely low toxicity to non-target organisms. Safe around pets and wildlife. OMRI organic listed.
❓ Frequently Asked Questions
Q: Is iron phosphate safe for pets?
Follow the product label. Keep pets out of treated areas until completely dried (2–4 hours for sprays). Once dry, treated surfaces pose minimal risk to dogs and cats.
Q: Can I use iron phosphate indoors?
Check the specific product label — formulations vary. Baits and dusts often have indoor labeling; concentrates and granulars are typically outdoor.
Q: How long does iron phosphate last after application?
Residual varies by formulation, surface type, weather, and UV exposure. Indoor applications last longer than outdoor. Check the product label for re-application intervals.
Q: What should I do if exposed?
Remove contaminated clothing, wash skin with soap and water. For eye contact, rinse 15–20 minutes. For ingestion or severe symptoms, call Poison Control (1-800-222-1222). Have the product label available.
📋 Safety Data Sheet (SDS)
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Iron Phosphate (Slug & Snail Bait) — Safety Data Sheet
View the official SDS document for this product directly on the CDMS label database.
💡 Did you know? Iron phosphate was first registered as a pesticide in 1997 and quickly became the organic gardener's go-to slug control. Sluggo alone has prevented millions of dogs from being poisoned by the older, toxic metaldehyde baits.
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Reviewed by Derek GiordanoContent reviewed by a licensed pest management professional. Last reviewed: April 2026.
