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1023 items found.

View the OMRI Generic Materials List Glossary in PDF format here.
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Plant Pesticides
Allowed with Restrictions
Crop Pest, Weed, and Disease Control
Nonsynthetic
See BOTANICAL PESTICIDES.
Plant Preparations
Allowed
Crop Fertilizers and Soil Amendments, Crop Management Tools and Production Aids
Nonsynthetic
Allowed unless otherwise specifically restricted or prohibited. See also PLANT EXTRACTS for allowed extractants. Plant preparations that are biocidal in nature are considered botanical pesticides and are restricted; see also PLANT PESTICIDES. See Glossary for definition of "plant preparation."
205.105
Plant Protectants – nonsynthetic
Allowed
Crop Management Tools and Production Aids
Nonsynthetic
Materials that protect plants from harsh environmental conditions such as frost and sunburn, or from infection, or the build-up of dirt on leaf surfaces, or injury by a pest. Nonsynthetic substances are allowed including diatomaceous earth, pine oil, pine resin, and yucca.
205.105
Plant Protectants – synthetic
Prohibited
Crop Management Tools and Production Aids
Synthetic
All synthetic plant protectants are prohibited unless specifically allowed.
205.105(a)
Plants
Allowed
Crop Fertilizers and Soil Amendments, Crop Management Tools and Production Aids
Nonsynthetic
Includes aquatic or terrestrial plants or parts of plants such as cover crops, green manures, crop wastes, hay, leaves, meals and straw. Parts of plants used as soil amendments and foliar feeds are permitted. May be from nonorganic sources. Specific materials must be evaluated using the OMRI GMO Decision trees to determine compliance. See also COCOA BEAN HULLS, COTTON GIN TRASH, COTTONSEED MEAL, PLANT EXTRACTS, and individual plant listings.
205.203(c)(3) Uncomposted plant materials.
Plastic Feed Pellets
Prohibited
Livestock Feed Ingredients
Synthetic
Prohibited for roughage.
205.237(b)(3)
Poloxalene (CAS #9003-11-6)
Allowed with Restrictions
Livestock Health Care
Synthetic
May only be used if preventive practices and veterinary biologics are inadequate to prevent sickness and only for the emergency treatment of bloat.
205.238(b) & 205.603(a)(21)
Polyethylene Glycol
Prohibited
Crop Management Tools and Production Aids
Synthetic
205.105(a)
Polysorbate 60 and 80
Prohibited
Processing Non-agricultural Ingredients and Processing Aids
Synthetic Nonagricultural
205.105(c) [General prohibition]
Pomace
Allowed
Crop Fertilizers and Soil Amendments
Nonsynthetic
Must not contain prohibited synthetic substances or residues.
205.203(c)
Potassium
Allowed with Restrictions
Livestock Feed Ingredients, Livestock Health Care
Synthetic/Nonsynthetic
May be derived from potassium bicarbonate, potassium carbonate, potassium citrate, potassium glycerophosphate, potassium hydroxide, or potassium sulfate. See also MINERALS listings.
205.237(a), 205.237(b)(2) & 205.603(d)(2)
Potassium Acid Tartrate
Allowed
Processing Non-agricultural Ingredients and Processing Aids
Synthetic Nonagricultural
Also called potassium hydrogen tartrate, potassium bitartrate, or cream of tartar.
205.605(b)
Potassium Alginate
Allowed
Processing Non-agricultural Ingredients and Processing Aids
Synthetic Nonagricultural
205.605(b)
Potassium Bicarbonate
Allowed with Restrictions
Crop Pest, Weed, and Disease Control
Synthetic
May be used for disease control if the requirements of 205.206(e) are met.
205.206(e) & 205.601(i)(9) As plant disease control.
Potassium Carbonate
Prohibited
Crop Fertilizers and Soil Amendments
Synthetic
205.105(a)
Potassium Carbonate
Allowed
Processing Non-agricultural Ingredients and Processing Aids
Synthetic Nonagricultural
205.605(b)
Potassium Chloride
Allowed
Processing Non-agricultural Ingredients and Processing Aids
Nonsynthetic Nonagricultural
205.605(a)
Potassium Chloride
Allowed with Restrictions
Livestock Feed Ingredients, Livestock Health Care, Livestock Management Tools and Production Aids
Synthetic/Nonsynthetic
Source of potassium. May be used to treat diagnosed illnesses. As feed, potassium chloride may not be used to stimulate growth or production and may not be fed in amounts above those needed for adequate nutrition and health maintenance for the species at its specific stage in life. See also MINERALS listings.
205.237(a), 205.237(b)(2) & 205.603(d)(2)
Potassium Chloride (KCl)
Allowed with Restrictions
Crop Fertilizers and Soil Amendments
Nonsynthetic
Only from mined sources. Muriate of potash (potassium chloride) must be applied in a manner that minimizes chloride accumulation in the soil.
205.203(d)(3) & 205.602(e) A mined substance of high solubility.
Potassium Citrate
Allowed
Processing Non-agricultural Ingredients and Processing Aids
Synthetic Nonagricultural
205.605(b)
Potassium Glycerophosphate
Allowed with Restrictions
Livestock Feed Ingredients, Livestock Health Care
Synthetic/Nonsynthetic
Source of phosphate. See also MINERALS listings.
205.237(a), 205.237(b)(2) & 205.603(d)(2)
Potassium Hydroxide
Prohibited
Crop Fertilizers and Soil Amendments, Crop Management Tools and Production Aids
Synthetic
See also AQUATIC PLANT PRODUCTS – SYNTHETICALLY EXTRACTED and HUMIC ACIDS – ALKALI EXTRACTED.
205.105(a)
Potassium Hydroxide
Allowed with Restrictions
Crop Fertilizers and Soil Amendments, Crop Management Tools and Production Aids
Synthetic
May be used as either an adjuvant or inert ingredient in combination with active pesticidal ingredients. See also INERTS--List 4. May also be used to produce aquatic plant extracts and humic acids, alkali extracted; Solvent amount used is limited to that amount necessary for extraction. See also AQUATIC PLANT PRODUCTS-SYNTHETICALLY EXTRACTED and HUMIC ACIDS-ALKALI EXTRACTED.
Potassium Hydroxide
Allowed with Restrictions
Processing Non-agricultural Ingredients and Processing Aids, Processing Sanitizers and Cleaners
Synthetic Nonagricultural
Prohibited for use in lye peeling of fruits and vegetables except when used for peeling peaches
205.605(b)
Potassium Iodate
Allowed with Restrictions
Livestock Feed Ingredients, Livestock Health Care
Synthetic/Nonsynthetic
Source of iodine. See also MINERALS listings.
205.237(a), 205.237(b)(2) & 205.603(d)(2)
Potassium Iodide
Allowed with Restrictions
Livestock Feed Ingredients, Livestock Health Care, Livestock Management Tools and Production Aids
Synthetic/Nonsynthetic
Source of iodine. See also MINERALS listings.
205.237(a), 205.237(b)(2) & 205.603(d)(2)
Potassium Iodide – nonsynthetic
Allowed
Processing Non-agricultural Ingredients and Processing Aids
Nonsynthetic Nonagricultural
205.605(a)
Potassium Metabisulfite
Prohibited
Processing Non-agricultural Ingredients and Processing Aids
Synthetic Nonagricultural
205.105(c) [General Prohibition] & 205.301(f)(5)
Potassium Nitrate
Prohibited
Crop Fertilizers and Soil Amendments
Synthetic
Also known as niter, nitrate of potash, and saltpeter.
205.105(a)
Potassium Permanganate
Prohibited
Crop Fertilizers and Soil Amendments
Synthetic
205.105(a)
Potassium Permanganate
Allowed with Restrictions
Livestock Management Tools and Production Aids
Synthetic
For disinfecting livestock facilities or for food contact surfaces, provided measures are taken to prevent contact of the organic livestock, organically produced products, or organic ingredients with the substance used. See also CLEANING AGENTS listings. Prohibited in direct contact with food products or animals.
205.105(c)
Potassium Permanganate
Allowed with Restrictions
Processing Packaging and Containers, Processing Sanitizers and Cleaners
Synthetic Nonagricultural
May be used as a sanitizer and cleaner provided measures are taken to prevent contact of the organically produced products or ingredients with the substance used. May be used in packaging material provided there is no direct contact with organic processed products.
205.105(c)
Potassium Phosphates
Allowed with Restrictions
Processing Non-agricultural Ingredients and Processing Aids
Synthetic Nonagricultural
Allowed in products labeled "made with organic (specified ingredients or food group(s))." Prohibited in products labeled "organic." Includes mono-, di-, and tri-basic potassium phosphate.
205.605(b)
Potassium Silicate
Prohibited
Crop Fertilizers and Soil Amendments
Synthetic
205.105(a)
Potassium Silicate, aqueous
Allowed with Restrictions
Crop Pest, Weed, and Disease Control
Synthetic
CAS # 1312-76-1. The silica used in the manufacture of potassium silicate must be sourced from naturally occuring sand. May be used if the requirements of 205.206(e) are met.
Potassium Sorbate
Allowed with Restrictions
Crop Management Tools and Production Aids, Crop Pest, Weed, and Disease Control
Synthetic
For use as an adjuvant or inert ingredient in combination with active pesticidal ingredients only. See INERTS – LIST 4.
205.105(a)
Potassium Sorbate
Prohibited
Livestock Feed Ingredients
Synthetic
Prohibited as a feed preservative.
205.105(a)
Potassium Sulfate
Allowed with Restrictions
Livestock Feed Ingredients, Livestock Health Care
Synthetic/Nonsynthetic
Source of potassium and sulfur. See also MINERALS listings.
205.237(a), 205.237(b)(2) & 205.603(d)(2)
Potassium Sulfate – nonsynthetic
Allowed
Crop Fertilizers and Soil Amendments
Nonsynthetic
Only if from langbeinite or other nonsynthetic sources. See also MINED MINERALS – UNPROCESSED.
205.203(d)(3) A mined substance of low solubility.
Potassium Sulfate – synthetic
Prohibited
Crop Fertilizers and Soil Amendments
Synthetic
Includes potassium sulfate produced by acidulation or chemical reaction.
205.105(a)
Potassium Tartrates
Allowed
Processing Non-agricultural Ingredients and Processing Aids
Synthetic Nonagricultural
Refers to both "Potassium Acid Tartrate" and "Potassium Tartrate made from Tartaric acid."
205.605(b)
Potting Soil
Allowed
Crop Fertilizers and Soil Amendments
Nonsynthetic
See also TRANSPLANT/CONTAINER MEDIA.
205.105
Potting Soil
Allowed with Restrictions
Crop Fertilizers and Soil Amendments
Synthetic/Nonsynthetic
Potting soil that contains a restricted material must meet the restrictions of that ingredient. See also TRANSPLANT/CONTAINER MEDIA.
205.204
Predators & Parasites
Allowed
Crop Pest, Weed, and Disease Control
Nonsynthetic
Augmentation or introduction of predators or parasites of a pest species is permitted. See also BIOLOGICAL CONTROLS.
205.206(b)(1)
Preservatives – synthetic
Prohibited
Livestock Feed Ingredients
Synthetic
Prohibited for use in feed, feed supplements, and feed additives unless specifically allowed on the National List. See also EXCIPIENTS listings for use in health care products. See Glossary for definition of "preservative."
205.105(a)
Pressure-treated Lumber
Prohibited
Crop Management Tools and Production Aids
Synthetic
All synthetic wood preservatives are prohibited unless explicitly allowed or restricted. Copper chromium arsenate (CCA), creosote, and pentachlorophenol-treated lumbers are prohibited. See also ARSENATE-TREATED LUMBER.
205.206(f)
Pressure-treated Lumber
Allowed with Restrictions
Crop Management Tools and Production Aids
Synthetic
May be treated with nonsynthetic materials and individual treatments that are on the National List for disease control. See also ARSENATE-TREATED LUMBER; BORON PRODUCTS – SYNTHETIC; COPPERS – FIXED; and COPPER SULFATE.
205.206(f)
Probiotics
Prohibited
Livestock Feed Ingredients, Livestock Health Care
Nonsynthetic
GMO sources are prohibited. See Glossary for definition of "probiotics."
205.105(e)
Probiotics – health care
Allowed with Restrictions
Livestock Health Care
Nonsynthetic
Must not be from genetically modified sources. Carriers may be from nonorganic sources if the probiotic is used for health care only. Carriers may not be from genetically modified sources. Restricted probiotics cannot be offered free choice to organic animals on a routine basis. See also CARRIERS listings. Probiotics that are animal drugs must not be administered in the absence of illness. See also EXCIPIENTS listings and BIOLOGICS. See Glossary for definition of "probiotics."
205.105 & 205.238(c)(1)
Probiotics – routinely fed
Allowed with Restrictions
Livestock Feed Ingredients, Livestock Health Care
Nonsynthetic
Direct fed microorganisms as listed by AAFCO must not be from genetically modified sources. All carriers must be organic or have “allowed” status when used in feed additives and supplements fed on a routine basis. See also CARRIERS listings and MICROORGANISMS – DIRECT FED. Feed ingredient additives and supplements must not be used in amounts above those needed for adequate nutrition and health maintenance for the species at its specific stage of life. See Glossary for definition of "probiotics."
205.105 & 205.238(c)(1)