citric acid anhydrous
** hydrogen citrate ** Translations

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GENERAL INFORMATION
for citric acid anhydrous

Description: A naturally occuring acid substance that is used as a disinfectant and fungicide and also used in some pesticide formulations as an acidity regulator

Appearance and life cycle: -

Introduction: -

Taxonomic classification: -

EC Regulation 1107/2009 (repealing 91/414):
Status Not listed/not regulated
Dossier rapporteur/co-rapporteur Not applicable
Date inclusion expires Not applicable

Approved for use () or known to be used () in the following European countries:

AT

BE

BG

CY

CZ

DE

DK

EE

EL

ES

FI

FR

HU

IE

IT

LT

LU

LV

MT

NL

PL

PT

RO

SE

SI

SK

UK

Also registered in: USA

Known to used in the following countries: -

General status:
Biopesticide type Fungicide, Microbiocide, Other product constituent
Other constituent type Acidity regulator
Substance group Plant derived
Substance origin Natural
Mode of action Unclear mode of action
Substance source A component of all citrus fruit
Substance production Extracted from citrus fruit for use in organic farming also manufactured
Uses Crop protection
Target pests Wide range of insects including ants, aphids, beetles, mealybugs and mites
Target host Vegetables, fruit trees and ornamentals
Farming system suitability Suitable for use in organic farming and for IPM where approved for use in that country
CAS RN 77-92-9
EC number 201-069-1
CIPAC number -
US EPA chemical code 021801
Chiral molecule No
Chemical formula C6H8O7
SMILES C(CC(O)=O)(CC(O)=O)(C(O)=O)O
International Chemical Identifier (InChI) InChI=1/C6H8O7/c7-3(8)1-6(13,5(11)12)2-4(9)10/h13H,1-2H2,(H,7,8)(H,9,10)(H,11,12)
Structure diagram/image available? Yes
Molecular mass (g mol-1) 192.12
PIN (Preferred Identification Name) -
IUPAC name 2-hydroxypropane-1,2,3-tricarboxylic acid
CAS name 3-hydroxypentanedioic acid-3-carboxylic acid
Other status information -
Herbicide Resistance Classification (HRAC) Not applicable
Insecticide Resistance Classification (IRAC) Not applicable
Fungicide Resistance Classification (FRAC) Not applicable
Physical state White crystalline solid
Related substances & organisms -

Formulations:
Property Product Manufacturer
Example products Citric acid T.J. Baker
Sharpshooter St. Gabriel
Formulation and application details Usually supplied as an aqueous concentrate.


ENVIRONMENTAL FATE

for citric acid anhydrous

Property Value Source/Quality Score/Other Information Interpretation
Solubility - In water at 20oC (mg l-1) 1330000 Q3 High
Solubility - In organic solvents at 20oC (mg l-1) - - -
Melting point (oC) 153 V3 -
Boiling point (oC) - - -
Degradation point (oC) - - -
Flashpoint (oC) - - -
Octanol-water partition coefficient at pH 7, 20oC P 2.29 X 10-02 Calculated -
Log P -1.64 V3 Low
Bulk density (g ml-1)/Specific gravity 1.665 Q3 -
Dissociation constant (pKa) at 25oC 3.15 Q3 -
Note: Weak acid, pKa(2) = 4.77, pKa(3) = 6.40
Vapour pressure at 25oC (mPa) 2.21 X 10-06 CA2 - Estimated Non-volatile
Henry's law constant at 25oC (Pa m3 mol-1) 4.36 X 10-09 CA2 - Estimated Non-volatile
Henry's law constant at 20oC (dimensionless) 1.31 X 10-16 Calculated Non-volatile
Maximum UV-vis absorption L mol-1 cm-1 - - -
Surface tension (mN m-1) - - -

Degradation:
Property Value Source/Quality Score/Other Information Interpretation
Soil degradation (days) (aerobic) DT50 (typical) 20 R2 Non-persistent
DT50 (lab at 20oC) - - -
DT50 (field) - - -
DT90 (lab at 20oC) - - -
DT90 (field) - - -
Note DT50 1-42 days in sludge (R2)
Aqueous photolysis DT50 (days) at pH 7 Value - - -
Note -
Aqueous hydrolysis DT50 (days) at 20oC and pH 7 Value - - -
Note -
Water-sediment DT50 (days) - - -
Water phase only DT50 (days) - - -

Soil adsorption and mobility:
Property Value Source/Quality Score/Other Information Interpretation
Linear Kd - CA2 Very mobile
Koc 3.1
Notes and range Estimated
Freundlich Kf - - -
Kfoc -
1/n -
Notes and range -
pH sensitivity -


ECOTOXICOLOGY

for citric acid anhydrous

Property Value Source/Quality Score/Other Information Interpretation
Bio-concentration factor BCF - - -
CT50 (days) - -
Bioaccumulation potential - Calculated Low
Mammals - Acute oral LD50 (mg kg-1) > 3000 V3 Rat Low
Mammals - Short term dietary NOEL (mg kg-1) - - -
(ppm diet) - -
Birds - Acute LD50 (mg kg-1) - - -
Birds - Short term dietary (LC50/LD50) - - -
Fish - Acute 96 hour LC50 (mg l-1) 864 E3 Carassius auratus Low
Fish - Chronic 21 day NOEC (mg l-1) - - -
Aquatic invertebrates - Acute 48 hour EC50 (mg l-1) 120 E3 Daphnia magna Low
Aquatic invertebrates - Chronic 21 day NOEC (mg l-1) - - -
Aquatic crustaceans - Acute 96 hour LC50 (mg l-1) - - -
Sediment dwelling organisms - Acute 96 hour LC50 (mg l-1) - - -
Sediment dwelling organisms - Chronic 28 day NOEC, static, water (mg l-1) - - -
Sediment dwelling organisms - Chronic 28 day NOEC, sediment (mg kg-1) - - -
Aquatic plants - Acute 7 day EC50, biomass (mg l-1) - - -
Algae - Acute 72 hour EC50, growth (mg l-1) 640 E3 Scenedesmus quadricauda Low
Algae - Chronic 96 hour NOEC, growth (mg l-1) - - -
Honeybees - Acute 48 hour LD50 (μg bee-1) - - -
Earthworms - Acute 14 day LC50 (mg kg-1) - - -
Earthworms - Chronic 14 day NOEC, reproduction (mg kg-1) - - -
Other soil macro-organisms - e.g. Collembola LR50 / EC50 / NOEC / % Effect - - -
Other arthropod (1) LR50 g ha-1 - - -
% Effect - - -
Other arthropod (2) LR50 g ha-1 - - -
% Effect - - -
Soil micro-organisms - - -
Mesocosm study data NOEAEC mg l-1 - - -
NOEAEC mg l-1 - - -


HUMAN HEALTH AND PROTECTION

for citric acid anhydrous

General:
Property Value Source/Quality Score/Other Information Interpretation
Mammals - Acute oral LD50 (mg kg-1) > 3000 V3 Rat Low
Mammals - Dermal LD50 (mg kg-1 body weight) - - -
Mammals - Inhalation LC50 (mg l-1) - - -
Other Mammal toxicity endpoints - -
ADI - Acceptable Daily Intake (mg kg-1bw day-1) - - -
ARfD - Acute Reference Dose (mg kg-1bw day-1) - - -
AOEL - Acceptable Operator Exposure Level - Systemic (mg kg-1bw day-1) - - -
Dermal penetration studies (%) - - -
Dangerous Substances Directive 76/464 - - -
Exposure Limits - - -
Exposure Routes Public -
Occupational -

Health issues:
Carcinogen Mutagen Endocrine disrupter Reproduction / development effects Acetyl cholinesterase inhibitor Neurotoxicant Respiratory tract irritant Skin irritant Eye irritant

-

General human health issues May cause skin sensitisation
May cause gastrointestinal irritation with nausea, vomiting and diarrhea at high doses

: Yes, known to cause a problem
: No, known not to cause a problem
: Possibly, status not identified
- : No data

Handling issues:
Property Value Source/Quality Score/Other Information Interpretation
General Prevent generation of dusts
CLP classification 2013 -
EC Risk Classification Xi - Irritant: R36/37/38
N - Dangerous for the environment: R53
EC Safety Classification S26, S37/39
WHO Classification NL - Not listed
US EPA Classification (formulation) No consensus across products or no products available - -
UN Number -
Waste disposal & packaging -


TRANSLATIONS

for citric acid anhydrous

Language Name
English citric acid anhydrous
French acide citrique
German -
Danish -
Italian -
Spanish -
Greek -
Slovenian -
Polish -
Swedish -
Hungarian -
Dutch -

Record last updated: Saturday 06 August 2011
Contact: aeru@herts.ac.uk