PAN Pesticides Database - Pesticide Products

Product Name on Label: Spectracide weed stop weed killer for lawns concentrate 2

The EPA Registered Name for this product is: Chemsico lawn weed killer concentrate
This occurs when a single registered product is sold using many different names. For a complete list, see the Distributor Names list at the bottom of the page.

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Identifying information, including U.S. EPA registration number, product registration status, formulation and warning label, as well as links to sources of product labels and MSDS information.
Summary of the toxicity properties of each active ingredient and the percent of each active ingredient in the product.
Approved uses for the product by general use type, pest, and crop or location.
Product registration history, including initial date registered, date cancelled (if applicable), and date registration was transferred (if applicable).
Name, address, and identifying number of the company that registered the product. Name and address of the agent, if applicable.
Complete list of names under which this product is sold. Often a company will register a single product and then sell the same product under many different brand names. The 'Distributor Name' list is a complete list of these names.

Product Identification for Chemsico lawn weed killer concentrate

Basic Identification Information About This Product
MSDS and Product Label
U.S. EPA Product Reg No
Product Registration Status
Acute Hazard Warning Label
Restricted Use Product
PAN Bad Actor Product:
No. of names this product is sold under
Soluble concentrate
3 Caution
2 (See bottom of page for complete list of products)

Toxicity for Chemsico lawn weed killer concentrate

Summary Toxicity Information for the Active Ingredients in this Product
For detailed chemical information click on the chemical names below

Active Ingredients
Chemical Name
Percent Carcinogen Cholinesterase
Developmental or
Reproductive Toxin
Dicamba, dimethylamine salt 0.63 % Not Likely No
2,4-D, dimethylamine salt 5.67 % Possible No
MCPP-P, dimethylamine salt 1.34 % Possible No
Indicates high toxicity in the given toxicological category. Indicates no available weight-of-the-evidence assessment. For additional information on toxicity from scientific journals or registration documents, see the "Additional Resources for Toxicity " section of the chemical detail page for each active ingredient.

Other Ingredients in this Product

By U.S. law, only active ingredients (AIs) are reported. In addition to active ingredients, pesticide products may contain one or more "inert" ingredients. Many "inert" ingredients in current use have known adverse human and environmental effects.

U.S. EPA statement on inerts      U.S. EPA list of inerts     NCAP Inerts Report (pdf)


Historic Uses in the U.S. for Chemsico lawn weed killer concentrate

Note! This product is now cancelled, when it was registered it was used for the following:


Herbicide terrestrial


Broadleaf weeds , Thistle , Pigweed , Purslane , Carpetweed , Poison ivy , Poison oak , Chickweed , Pearlwort , Lambsquarters , Kochia , Yarrow , Ragweed , Burdock , English daisy , Chicory , Fleabane , Dogfennel , Cudweed , Matchweed , Hawkweed , Spotted catsear , Wild lettuce , Prickly lettuce , False dandelion , Bristly oxtongue , Dandelion , Morningglory , Bindweed , Mustard , Yellow rocket , Shepherdspurse , Hairy bittercress , Peppergrass , Pepperweed , Pennycress , Spurge , Spotted spurge , Oak , Filaree , Cranesbill , Wild geranium , Carolina geranium , Ground ivy , Deadnettle , Henbit , Healall , Clover , Lespedeza , Black medic , Wild onion , Wild garlic , Mallow , Dollarweed , Ash , Oxalis , Creeping woodsorrel , Plantain , Buckhorn plantain , Knotweed , Dock , Red sorrel , Sheep sorrel , Scarlet pimpernel , Cinquefoil , Virginia buttonweed , Bedstraw , Wild carrot , Pennywort , Prostrate vervain , Wild violet , Puncturevine , Spurweed

Crops and Locations

Ornamental lawns (foliar treatment) , Bahiagrass (lawns) (foliar treatment) , Bentgrass (lawns) (foliar treatment) , Bermudagrass (lawns) (foliar treatment) , Bluegrass (lawns) (foliar treatment) , Centipedegrass (lawns) (foliar treatment) , Fescue (lawns) (foliar treatment) , Kentucky bluegrass (lawns) (foliar treatment) , Ryegrass (perennial) (lawns) (foliar treatment) , St. augustinegrass (lawns) (foliar treatment) , Zoysiagrass (lawns) (foliar treatment)

U.S. Product Registration History for Chemsico lawn weed killer concentrate

U.S. EPA Product Reg No:
Product Registration Status:
Approval Date:
Nov 23, 1998  
Cancellation Date:
Sep 19, 2007  
Cancel/Transfer Reason:
Company request

Company and Agent Information for Spectracide weed stop weed killer for lawns concentrate 2

Manufacturer Agent Distributor
Po box 142642
St louis, MO 63114
Company Number: 009688
No Agent, See Company Info. Spectrum group
Po box 142642
St louis, MO 63114
Company Number: 008845

Distributor Names for Chemsico lawn weed killer concentrate

Product names Distributor Product Type Approval Date Cancellation Date
Chemsico lawn weed killer concentrate Chemsico Parent Product Nov 23, 1998 Sep 19, 2007
Spectracide weed stop weed killer for lawns concentrate 2 Chemsico Distributor Product Dec 15, 1998 Sep 19, 2007
Working with the Information on this Page

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