Corn steep liquor |

Last updated: 01/02/2025
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(Also known as: Condensed fermented corn extract) |
The following alerts are based on the data in the tables below. An absence of an alert does not imply the substance has no implications for human health, biodiversity or the environment but just that we do not have the data to form a judgement.
Environmental fate |
Ecotoxicity |
Human health |
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A by-product of the wet corn milling process which is rich in nutrients, amino acids, vitamins and minerals with application as a biostimulant and plant elixor |
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Growth; Stress |
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All plants |
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Corn steep liquor has shown, in trials and lab studies, to have biostimulant activity. It contains a large amount of different organic compounds with biological activity for both the plants and soil. There are a few published studies available which support claims that corn steep liquor may protect plants from specific abiotic and biotic stresses (extreme temperatures, nutritional limitations, salinity, drought, pathogens). Study results showed that application of the liquor increased aerial biomass and leaf area under normal and saline conditions. In addition, studies have observed improved plant growth in both normal soils and when grown in hydroponic systems. |
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Current |
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A by-product of the wet corn milling process |
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Corn is soaked in water containing sulphur dioxide which results in chemical and physical changes in the kernels separating the starche and soluble proteins. The liquid is then filtered and concentrated. |
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Not approved |
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Not applicable |
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No UK approval for use as a pesticide |
EC Regulation 1107/2009 (repealing 91/414) |
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Not approved |
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Not applicable |
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Not applicable |
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Not applicable |
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Yes |
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ATAustria |
BEBelgium |
BGBulgaria |
CYCyprus |
CZCzech Republic |
DEGermany |
DKDenmark |
EEEstonia |
ELGreece |
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ESSpain |
FIFinland |
FRFrance |
HRCroatia |
HUHungary |
IEIreland |
ITItaly |
LTLithuania |
LULuxembourg |
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LVLatvia |
MTMalta |
NLNetherlands |
PLPoland |
PTPortugal |
RORomania |
SESweden |
SISlovenia |
SKSlovakia |
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Not applicable |
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No |
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Other substance |
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Biosurfactant; Biofertiliser; Soil conditioner, Plant elixor, Biostimulant - growth enhancement & improved abiotic stress resiliance |
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Plant-derived substance |
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Natural; Complex mixture |
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As a biostimulant the mode of action is not fully clear. Some studies have concluded that growth, plant strength and so abiotic stress tolerance is due to an improvement in the photosynthetic efficiency and a reduction in the generation of reactive oxygen species. Supports the growth of nitrogen-fixing and phosphorus-solubilizing bacteria |
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Corn steep liqour |
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Not applicable |
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Not applicable |
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Not applicable |
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Not applicable |
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A viscous brown liquid |
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Usually formulated as a liquid concentrate |
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As this parameter is not normally measured directly, a surrogate measure is used: ‘Photochemical oxidative DT₅₀’. Where data is available, this can be found in the Fate Indices section below. |
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Soil adsorption and mobility |
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Cannot be calculated |
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None
Terrestrial ecotoxicology |
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> 2000 |
Q3 Q = Miscellaneous data from online sources 3 = Unverified data of known source Rat |
Low |
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HUMAN HEALTH AND PROTECTION |
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> 2000 |
Q3 Q = Miscellaneous data from online sources 3 = Unverified data of known source Rat |
Low |
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EU MRL pesticide database |
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Carcinogen |
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Endocrine disruptor |
No data found |
A0 A = Chromosome aberration (EFSA database) 0 = No data ; B0 B = DNA damage/repair (EFSA database) 0 = No data ; C0 C = Gene mutation (EFSA database) 0 = No data ; D0 D = Genome mutation (EFSA database) 0 = No data ; E0 E = Unspecified genotoxicity type (miscellaneous data source) 0 = No data |
No data found |
Reproduction / development effects |
Acetyl cholinesterase inhibitor |
Neurotoxicant |
No data found |
No data found |
No data found |
Respiratory tract irritant |
Skin irritant |
Skin sensitiser |
No data found |
No data found |
No data found |
Eye irritant |
Phototoxicant |
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No data found |
No data found |
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No information available |
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No information available |
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corn steep liquor |
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Record last updated: |
01/02/2025 |
Contact: |
aeru@herts.ac.uk |
Please cite as: |
Lewis, K.A., Tzilivakis, J., Warner, D. and Green, A. (2016) An international database for pesticide risk assessments and management. Human and Ecological Risk Assessment: An International Journal, 22(4), 1050-1064. DOI: 10.1080/10807039.2015.1133242 |