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A litter deodorizer works best when it becomes part of the routine you already have: scoop, sprinkle, done. Arm & Hammer’s options all build on baking soda, but they differ in formula, scent, format and how much comes in each pack. The right choice depends on whether your cat tolerates scent, how many litter boxes you keep and how often you want to reorder.
According to the listings, the range here breaks into three groups. The Double Duty powder comes in 30 oz and 20 oz boxes in six-packs, with a claimed 9 days of odor control. Older-style formulas include the 30 oz Super Size pack and the 20 oz activated baking soda pack, both sold in fours. For scent lovers, the Forever Fresh lavender powder and the lavender and vanilla deodorizing crystals add fragrance on top of baking soda.
Arm & Hammer Cat Litter Deodorizer Lineup at a Glance
Best for: Trying crystals before buying bulk
Pros
- Dissolving crystal format
- Lavender and vanilla scent
- Single 15 oz container
Cons
- Made by licensee, not Church & Dwight
- Scented only
Best for: Owners who like a lavender scent
Pros
- Wild lavender scent, essential oils
- Baking soda with odor neutralizers
- Six 30 oz boxes
Cons
- Scented, not for scent-averse cats
- Capacity figures conflict
Best for: Single-cat homes with carpet nearby
Pros
- Activated baking soda
- Helps lift hair when vacuuming
- Four 20 oz boxes
Cons
- Minimal product details
- Smallest multi-pack total
Best for: One-cat homes wanting Double Duty
Pros
- Same Double Duty formula
- Smaller 20 oz boxes
- Odor control up to 9 days
Cons
- Less total than 30 oz pack
Best for: Owners wanting anti-stick help
Pros
- Moisture-activated scent
- Helps stop clumps sticking to box
- Four 30 oz boxes
Cons
- Very short listing
- Scent not named
Best for: Multi-cat homes stocking up
Pros
- Six 30 oz boxes, 180 oz total
- Odor control up to 9 days
- Works with any litter type
Cons
- 3 lb pack needs storage space
| Product | Box size and pack | Scent | Listed highlight |
|---|---|---|---|
| Double Duty 30 oz | 30 oz, 6 pack | Fresh, new-litter scent | Up to 9 days odor control |
| Super Size Pack 30 oz | 30 oz, 4 pack | Moisture-activated scent | Helps prevent clumps sticking |
| Double Duty 20 oz | 20 oz, 6 pack | Fresh, new-litter scent | Up to 9 days odor control |
| Activated Baking Soda 20 oz | 20 oz, 4 pack | Not specified | Helps lift hair when vacuuming |
| Forever Fresh 30 oz | 30 oz, 6 pack | Wild lavender | Made with essential oils |
| Deodorizing Crystals 15 oz | 15 oz, single | Lavender and vanilla | Dissolving crystals |
The Models in Detail
Arm & Hammer Double Duty Cat Litter Deodorizer, 30 oz, 6 Pack This kitty litter deodorizer destroys feces and urine odors on contact
Check price on Amazon 4.8 out of 5 — average from Amazon buyers
The ARM & HAMMER Cat Litter Deodorizer Double Duty six-pack gives you 180 ounces in six 30 oz boxes, about 11.3 pounds in all. It uses Arm & Hammer Baking Soda Crystals, which the listing says destroy feces and urine odors on contact. The brand cites internal lab tests showing lower odor levels than litter alone, and a fresh, new-litter scent for up to 9 days.
It works with scented, unscented, clay, scoopable and natural litter, and the listing states it is safe for daily use around cats and people when used as directed. The description also frames it as a room deodorizer for the area around the box.
This pack suits multi-cat homes and anyone with two or more litter boxes who sprinkles every day. The bigger boxes mean fewer trips to the cupboard, but you will need a shelf that holds six of them.
Arm & Hammer Cat Litter Deodorizer Super Size Pack, 30 oz, Pack of 4
Check price on Amazon 4.2 out of 5 — average from Amazon buyers
The ARM & Hammer Cat Litter Deodorizer-Super Size Pack has the thinnest listing of the group. The description says baking soda destroys odors instantly in all types of litter and keeps the box first-day fresh longer, with a moisture-activated scent that refreshes the litter each time your cat uses it.
It also mentions technology that helps prevent clumps from sticking to the bottom of the box, which is the one feature here that directly shortens scooping time. The listing does not name the scent, does not give a days-of-control claim and does not mention the Double Duty formula. The pack weighs 5.6 pounds per the dimensions line.
Pick this if clumps welded to the pan are the most annoying part of your routine. If you want the 9-day claim, the Double Duty packs are the ones that state it.
Arm & Hammer Double Duty Cat Litter Deodorizer, 20 oz, 6 Pack This kitty litter deodorizer destroys feces and urine odors on contact
Check price on Amazon 4.9 out of 5 — average from Amazon buyers
The ARM & Hammer Cat Litter Deodorizer Double Duty in 20 oz boxes shares the same feature list as the 30 oz version: baking soda crystals, odor elimination on contact, up to 9 days of control and compatibility with any litter. Six boxes add up to 120 ounces, or 7.5 pounds.
The smaller box is easier to handle one-handed while scooping and is quicker to use up before it absorbs moisture from a humid laundry room, a sensible consideration for a single box.
This is the pick for one-cat households that want the Double Duty formula without storing six large boxes. Households with several cats will run through it faster than the 30 oz pack.
Arm & Hammer for Pets Cat Litter Deodorizer with Activated Baking Soda, 20 oz, Pack of 4 An odor free-free home starts here
Check price on Amazon 4.3 out of 5 — average from Amazon buyers
The Arm & Hammer for Pets Cat Litter Deodorizer uses activated baking soda and is sold as four 20 oz boxes, 80 ounces in total. The listing promises maximum odor control and instant odor elimination, but gives few specifics.
One unusual line says it helps lift away unwanted hairs when you vacuum, which suggests it can be sprinkled on carpet around the litter area before vacuuming, though the listing does not give directions for that. It does not name a scent, list a days-of-control claim or specify litter compatibility.
This suits a single-cat home where the litter box sits on or near carpet. For clearer claims and more product per pack, the Double Duty options are better documented. For odors beyond the litter box, our Arm & Hammer pet odor eliminator guide covers sprays and fabric products.
Arm & Hammer Forever Fresh Cat Litter Deodorizer, 30 oz, 6-Pack Eliminates litter box odors and helps litter stay fresh longer
Check price on Amazon 4.4 out of 5 — average from Amazon buyers
The ARM & HAMMER Forever Fresh Cat Litter Deodorizer is the scented powder of the group. It is infused with a pet-friendly wild lavender scent made with essential oils, and combines Arm & Hammer Baking Soda with advanced odor neutralizers to eliminate odors on contact. It sprinkles on top of clay, scoopable or natural litter, scented or unscented.
The listing recommends using it with every fresh litter box or as needed between changes. The six-pack totals 180 ounces and 11.3 pounds. A capacity line of 1.9 pounds likely refers to a single box, but the listing does not explain it.
This suits owners who want the area around the box to smell of lavender rather than just neutral. Cats that dislike fragrance may prefer the Double Duty formula.
Arm & Hammer Cat Litter Deodorizing Crystals, Lavender and Vanilla, 15 oz Sprinkle a light layer of crystals over clean or freshly scooped litter
Check price on Amazon 4.2 out of 5 — average from Amazon buyers
The Arm & Hammer Cat Litter Deodorizing Crystals combine baking soda with dissolving crystals in a lavender and vanilla scent. You sprinkle a thin layer over clean litter, and the crystals spread through the litter and dissolve over time to manage odor between scooping and full changes.
This listing names Pets + People Consumer Products as the manufacturer rather than Church & Dwight, so it appears to be a licensed Arm & Hammer product. It comes as a single 15 oz container weighing about 1 pound.
This is a small, low-commitment way to try a scented crystal format before buying a six-pack. For a bulk supply, the powder packs above hold much more.
Matching a Model to Your Setup
- Two or more cats with several boxes: Double Duty 30 oz, 6 pack.
- One cat and limited cupboard space: Double Duty 20 oz, 6 pack.
- Clumps sticking to the pan: Super Size Pack 30 oz.
- Litter box on or near carpet: Activated Baking Soda 20 oz, 4 pack.
- You want a lavender scent in the room: Forever Fresh 30 oz, 6 pack.
- Trying crystals once before stocking up: Deodorizing Crystals, 15 oz.
Before You Buy
The listings do not give a set amount to sprinkle per box or per day, apart from the crystals’ thin-layer instruction. The Super Size and activated baking soda packs have sparse listings with no stated days of control, and the Forever Fresh listing gives conflicting capacity figures. None of them state whether the scent is suitable for cats with respiratory sensitivity, so start with a small amount if your cat is sensitive.
A deodorizer supports good litter habits but does not replace them. Daily scooping and a regular full change still matter, and a box with enough room and depth makes both easier; our look at a basic cat litter box covers what to look for.
FAQ
Which Arm & Hammer deodorizer should I buy for several cats?
The Double Duty 30 oz six-pack gives the most product at 180 ounces and states up to 9 days of odor control. The Forever Fresh six-pack matches the volume with a lavender scent.
Does Arm & Hammer cat litter deodorizer work with clumping litter?
The Double Duty and Forever Fresh listings say they work with clay, scoopable and natural litter, scented or unscented.
What is the difference between Double Duty and Forever Fresh?
Double Duty uses baking soda crystals with a fresh, new-litter scent and a 9-day claim. Forever Fresh adds a wild lavender scent made with essential oils.
Are Arm & Hammer deodorizing crystals the same as the powder?
No. The crystals dissolve over time in the litter and come in a lavender and vanilla scent, and the listing names a different manufacturer.
How often should I use a cat litter deodorizer?
The Double Duty listings suggest sprinkling daily. Forever Fresh recommends use with every fresh box or as needed between changes.