Chemical Safety Data Sheet MSDS / SDS
Maleic acid
Revision Date:2026-03-21Revision Number:1
Product identifier
- Product name: Maleic acid
- CBnumber: CB2852803
- CAS: 110-16-7
- EINECS Number: 203-742-5
- Synonyms: Maleic Acid (300 mg);Maleinic acid
Relevant identified uses of the substance or mixture and uses advised against
- Relevant identified uses: For R&D use only. Not for medicinal, household or other use.
- Uses advised against: none
Company Identification
- Company: Chemicalbook
- Address: Building 1, Huihuang International, Shangdi 10th Street, Haidian District, Beijing
- Telephone: 010-86108875
GHS Label elements, including precautionary statements
-
Symbol(GHS)
- Signal wordDanger
P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.
P301+P312 IF SWALLOWED: call a POISON CENTER or doctor/physician IF you feel unwell.
P280 Wear protective gloves/protective clothing/eye protection/face protection.
P264 Wash skin thouroughly after handling.
P261 Avoid breathing dust/fume/gas/mist/vapours/spray.
Hazard statements
H335 May cause respiratory irritation
H318 Causes serious eye damage
H317 May cause an allergic skin reaction
H315 Causes skin irritation
Substance
- Product name: Maleic acid
- Synonyms: Maleic Acid (300 mg);Maleinic acid
- CAS: 110-16-7
- EC number: 203-742-5
- MF: C4H4O4
- MW: 116.07
General advice
First aiders need to protect themselves. Show this safety data sheet to the doctor in attendance.
If inhaled
After inhalation: fresh air. Call in physician.
In case of skin contact
In case of skin contact: Take off immediately all contaminated clothing. Rinse skin with water/ shower. Call a physician immediately.
In case of eye contact
After eye contact: rinse out with plenty of water. Immediately call in ophthalmologist. Remove contact lenses.
If swallowed
After swallowing: make victim drink water (two glasses at most), avoid vomiting (risk of perforation). Call a physician immediately. Do not attempt to neutralise.
Most important symptoms and effects, both acute and delayed
The most important known symptoms and effects are described in the labelling (see section 2) and/or in section 11
Protection of first-aiders
For personal protection see section 8.
Notes to physician
No data available
Suitable extinguishing media
Water Foam Carbon dioxide (CO2) Dry powder
Unsuitable extinguishing media
For this substance/mixture no limitations of extinguishing agents are given.
Specific hazards during fire fighting
Combustible. Development of hazardous combustion gases or vapours possible in the event of fire.
Hazardous combustion products
Carbon oxides
Specific extinguishing methods
Prevent fire extinguishing water from contaminating surface water or the ground water system.
Special protective equipment for fire-fighters
Stay in danger area only with self-contained breathing apparatus. Prevent skin contact by keeping a safe distance or by wearing suitable protective clothing.
NFPA 704
2
1
1
| HEALTH | 2 | Intense or continued but not chronic exposure could cause temporary incapacitation or possible residual injury (e.g. diethyl ether, ammonium phosphate, iodine) | |
| FIRE | 1 | Materials that require considerable preheating, under all ambient temperature conditions, before ignition and combustion can occur. Includes some finely divided suspended solids that do not require heating before ignition can occur. Flash point at or above 93.3 °C (200 °F). (e.g. mineral oil, ammonia) | |
| REACT | 1 | Normally stable, but can become unstable at elevated temperatures and pressures (e.g. propene) | |
| SPEC. HAZ. |
Personal precautions, protective equipment and emergency procedures
Advice for non-emergency personnel: Avoid inhalation of dusts. Avoid substance contact. Ensure adequate ventilation. Evacuate the danger area, observe emergency procedures, consult an expert. Advice for emergency responders: For personal protection see section 8.
Environmental precautions
Do not let product enter drains.
Methods and materials for containment and cleaning up
Cover drains. Collect, bind, and pump off spills. Observe possible material restrictions (see sections 7 and 10). Take up dry. Dispose of properly. Clean up affected area. Avoid generation of dusts.
Handling
Advice on safe handlingWork under hood. Do not inhale substance/mixture.
Storage
Further information on storage conditionsTightly closed. Dry.
Storage class
8A, Combustible, corrosive hazardous materials
Recommended storage temperature
Recommended storage temperature see product label.
Ingredients with workplace control parameters
Contains no substances with occupational exposure limit values.
Engineering measures
No data available
Personal protective equipment
Respiratory protectionrequired when dusts are generated.
Our recommendations on filtering respiratory protection are based on the following standards: DIN EN 143, DIN 14387 and other accompanying standards relating to the used respiratory protection system.
Recommended Filter type
Our recommendations on filtering respiratory protection are based on the following standards: DIN EN 143, DIN 14387 and other accompanying standards relating to the used respiratory protection system.
Filter type P2
The entrepeneur has to ensure that maintenance, cleaning and testing of respiratory protective devices are carried out according to the instructions of the producer. These measures have to be properly documented.
Eye/face protection
The entrepeneur has to ensure that maintenance, cleaning and testing of respiratory protective devices are carried out according to the instructions of the producer. These measures have to be properly documented.
Use equipment for eye protection tested and approved under appropriate government standards such as NIOSH (US) or EN 166(EU).
Tightly fitting safety goggles
Skin and body protection
Tightly fitting safety goggles
Acid-resistant protective clothing
Hand protection
Material
Nitrile rubber
Break through time
480 min
Glove thickness
0.11 mm
Protective index
Full contact
Manufacturer
KCL 741 L
Material
Nitrile rubber
Break through time
480 min
Glove thickness
0.11 mm
Protective index
Splash contact
Manufacturer
KCL 741 L
Remarks
This recommendation applies only to the product stated in the safety data sheet, supplied by us and for the designated use. When dissolving in or mixing with other substances and under conditions deviating from those stated in EN 16523-1 please contact the supplier of CE-approved gloves (e.g. KCL GmbH, D- 36124 Eichenzell, Internet: www.kcl.de).
Hygiene measures
Immediately change contaminated clothing. Apply preventive skin protection. Wash hands and face after working with substance.
Information on basic physicochemical properties
- Physical statePowder/Solid
- Solubility478.8g/l
- Minimum ignition energy> 30 - < 100 mJ
- Particle characteristics Particle sizeNo data available
- Molecular weight116.07 g/mol
- Oxidizing propertiesnone
- Explosive propertiesNot classified as explosive.
- Flow timeNo data available
- Viscosity, kinematicNo data available
- Viscosity, dynamicNo data available
- Decomposition temperature> 135 °C
- Autoignition temperatureNo data available
- Partition coefficient: n-octanol/waterlog Pow: -1.3 (20 °C)
- Water solubility478.8 g/l completely soluble (20 °C)
- Density1.59 g/cm3 (20 °C)
- Relative density1.59 g/mL at 25 °C (lit.)
- Relative vapor density4.0 (20 °C )
- Vapor pressure< 0.1 hPa (20 °C)
Method: OECD Test Guideline 104
GLP: yes - Lower explosion limit / Lower flammability limitNo data available
- Upper explosion limit / Upper flammability limitNo data available
- Burning rateNo data available
- Evaporation rateNo data available
- Flash point127 °C
- Boiling point/boiling range157.8 °C (997 hPa)
Method: OECD Test Guideline 103
GLP: yes - Melting point/ range130 - 135 °C
- pH2.5
Method: OECD Test Guideline 107
GLP: yes Bioaccumulation is not expected. - pH0.2 - 0.3
Method: OECD Test Guideline 105
GLP: yes - pH1.3 (20 °C)
Concentration: 100 g/l - Odor ThresholdNo data available
- Odorslightly sourish
- Colorwhite
- Appearancepowder, finecrystalline
Reactivity
The following applies in general to flammable organic substances and mixtures: in correspondingly fine distribution, when whirled up a dust explosion potential may generally be assumed.
Chemical stability
The product is chemically stable under standard ambient conditions (room temperature) .
Possibility of hazardous reactions
Violent reactions possible with: Oxidizing agents Bases Reducing agents
Conditions to avoid
no information available
Incompatible materials
No data available
Hazardous decomposition products
In the event of fire: see section 5
11.1 Information on toxicological effects
Acute toxicityLD50 Oral - Rat - male - 1,030 mg/kg (OECD Test Guideline 401)
Remarks: (ECHA)
Inhalation: No data available
LD50 Dermal - Rabbit - 1,560 mg/kg
Remarks: (ECHA)
Skin corrosion/irritation
Remarks: (ECHA)
Inhalation: No data available
LD50 Dermal - Rabbit - 1,560 mg/kg
Remarks: (ECHA)
Skin - in vitro membrane barrier
Result: Causes burns. - 0.41 h (OECD Test Guideline 435)
Remarks: (ECHA)
Serious eye damage/eye irritation
Result: Causes burns. - 0.41 h (OECD Test Guideline 435)
Remarks: (ECHA)
Eyes - Rabbit
Result: Causes serious eye damage.
(OECD Test Guideline 405)
Respiratory or skin sensitization
Result: Causes serious eye damage.
(OECD Test Guideline 405)
Maximisation Test - Guinea pig
Result: positive (OECD Test Guideline 406)
Local lymph node assay (LLNA) - Mouse
Result: positive (OECD Test Guideline 429) (Regulation (EC) No 1272/2008, Annex VI)
Germ cell mutagenicity
Result: positive (OECD Test Guideline 406)
Local lymph node assay (LLNA) - Mouse
Result: positive (OECD Test Guideline 429) (Regulation (EC) No 1272/2008, Annex VI)
Classified based on available data. For more details, see section 2
Carcinogenicity
Classified based on available data. For more details, see section 2
Reproductive toxicity
Classified based on available data. For more details, see section 2
Specific target organ toxicity - single exposure
May cause respiratory irritation. - Respiratory system
Specific target organ toxicity - repeated exposure
Classified based on available data. For more details, see section 2
Aspiration hazard
Classified based on available data. For more details, see section 2
11.2 Additional Information
Gastrointestinal disturbance
To the best of our knowledge, the chemical, physical, and toxicological properties have not been thoroughly investigated.
Systemic effects:
After absorption:
Allergic reactions
Cough
Irritations
Shortness of breath
Vomiting
Lung oedema
Possible effects:
Damage to: respiratory tract
Other dangerous properties can not be excluded.
Handle in accordance with good industrial hygiene and safety practice.
To the best of our knowledge, the chemical, physical, and toxicological properties have not been thoroughly investigated.
Systemic effects:
After absorption:
Allergic reactions
Cough
Irritations
Shortness of breath
Vomiting
Lung oedema
Possible effects:
Damage to: respiratory tract
Other dangerous properties can not be excluded.
Handle in accordance with good industrial hygiene and safety practice.
Ecotoxicity
Components:
maleic acid:
Toxicity to daphnia and other aquatic invertebratesEC50 (Daphnia magna (Water flea)): 42.81 mg/l End point: Immobilization Exposure time: 48 h Test Type: static test Analytical monitoring: yes Method: OECD Test Guideline 202 GLP: yes
Toxicity to algae/aquatic plants
ErC50 (Pseudokirchneriella subcapitata (green algae)): 74.35 mg/l Exposure time: 72 h Test Type: static test Analytical monitoring: yes Method: OECD Test Guideline 201 GLP: yes
Toxicity to daphnia and other aquatic invertebrates (Chronic toxicity)
EC50 (Daphnia magna (Water flea)): 77 mg/l End point: reproduction rate Exposure time: 21 d Remarks: The value is given in analogy to the following substances: (ECHA) The value is given in analogy to the following substances: maleic anhydride
Toxicity to microorganisms
EC10 (Pseudomonas putida): 44.6 mg/l End point: Growth rate Exposure time: 18 h Test Type: static test Method: DIN 38 412 Part 8 Remarks: The value is given in analogy to the following substances: The value is given in analogy to the following substances: maleic anhydride
Ecotoxicology Assessment
Chronic aquatic toxicityThis product has no known ecotoxicological effects.
Persistence and degradability
Components:
maleic acid:
Biodegradabilityaerobic Inoculum: activated sludge Concentration: 33.3 mg/l Result: Readily biodegradable. Biodegradation: 97.08 % Exposure time: 28 d Method: OECD Test Guideline 301B GLP: yes
ThOD
830 mg/g Remarks: (Lit.)
BOD/ThOD
77 % Remarks: (Lit.)
Bioaccumulative potential
Components:
maleic acid:
Partition coefficient: noctanol/waterlog Pow: -1.3 (20 °C) pH: 2.5 Method: OECD Test Guideline 107 GLP: yes Remarks: Bioaccumulation is not expected.
Mobility in soil
No data available
Other adverse effects
Components:
maleic acid:
Results of PBT and vPvB assessmentSubstance does not meet the criteria for PBT or vPvB according to Regulation (EC) No 1907/2006, Annex XIII.
Additional ecological information
Discharge into the environment must be avoided.
Disposal methods
Waste from residuesOffer surplus and non-recyclable solutions to a licensed disposal company.
International Regulations
IATA-DGR
UN/ID No. : UN 3261
Proper shipping name : Corrosive solid, acidic, organic, n.o.s.
(maleic acid)
Class : 8
Packing group : II
Labels : Class 8 - Corrosive substances
Packing instruction (cargo aircraft) : 863
Packing instruction (passenger aircraft) : 859
Proper shipping name : Corrosive solid, acidic, organic, n.o.s.
(maleic acid)
Class : 8
Packing group : II
Labels : Class 8 - Corrosive substances
Packing instruction (cargo aircraft) : 863
Packing instruction (passenger aircraft) : 859
IMDG-Code
UN number : UN 3261
Proper shipping name : CORROSIVE SOLID, ACIDIC, ORGANIC, N.O.S.
(maleic acid)
Class : 8
Packing group : II
Labels : 8
EmS Code : F-A, S-B
Marine pollutant : no
Proper shipping name : CORROSIVE SOLID, ACIDIC, ORGANIC, N.O.S.
(maleic acid)
Class : 8
Packing group : II
Labels : 8
EmS Code : F-A, S-B
Marine pollutant : no
Transport in bulk according to Annex II of MARPOL 73/78 and the IBC Code
Not applicable for product as supplied.
National Regulations
JT/T 617
UN number : UN 3261
Proper shipping name : CORROSIVE SOLID, ACIDIC, ORGANIC, N.O.S.
(maleic acid)
Class : 8
Packing group : II
Labels : 8
Environmentally hazardous : no
Proper shipping name : CORROSIVE SOLID, ACIDIC, ORGANIC, N.O.S.
(maleic acid)
Class : 8
Packing group : II
Labels : 8
Environmentally hazardous : no
Special precautions for user
The transport classification(s) provided herein are for informational purposes only, and solely based upon the properties of the unpackaged material as it is described within this Safety Data Sheet. Transportation classifications may vary by mode of transportation, package sizes, and variations in regional or country regulations.
Catalogue of Hazardous Chemicals : This product is not listed in the catalogue of hazardous chemicals, but it meets the definition of hazardous chemicals and its principles of determination.
National regulatory information
Regulations on Safety Management of Hazardous Chemicals
Identification of Major Hazard Installations for Hazardous Chemicals (GB 18218)
Not listed
Hazardous Chemicals for Priority Management
Not listed under SAWS
Catalogue of Specially Controlled Hazardous
Not listed Chemicals
List of Explosive Precursors
Not listed
Regulations on Labour Protection in Workplaces where Toxic Substances are Used
Catalogue of Highly Toxic Chemicals
Not listed
Regulation of Environmental Management on the First Import of Chemicals and the Import and Export of Toxic Chemicals
China Severely Restricted Toxic Chemicals for Import and Export
Not listed
Regulation on the Administration of Precursor Chemicals
Catalogue and Classification of Precursor Chemicals
Not listed
Regulations on the Administration of Controlled Chemicals
List of Controlled Chemicals
Not listed
Regulations of Ozone Depleting Substances Management
List of Controlled Ozone Depleting Substances
Not listed
List of Controlled Ozone Depleting Substances Import and Export
Not listed
Environmental Protection Law
List of Priority Controlled Chemicals
Not listed
List of Key Controlled New Pollutants
Not listed
Full text of other abbreviations
AIIC - Australian Inventory of Industrial Chemicals
ANTT - National Agency forTransport by Land of Brazil
ASTM - American Society for the Testing of Materials
bw - Body weight
CMR - Carcinogen, Mutagen or Reproductive Toxicant
DIN -Standard of the German Institute for Standardisation
DSL - Domestic SubstancesList (Canada)
ECx - Concentration associated with x% response
ELx - Loading rate associated with x% response
EmS - Emergency Schedule
ENCS - Existing and NewChemical Substances (Japan)
ErCx - Concentration associated with x% growth rate response
ERG - Emergency Response Guide
GHS - Globally Harmonized System
GLP - Good Laboratory Practice
IARC - International Agency for Research on Can- cer
IATA - International Air Transport Association
IBC - International Code for theConstruction and Equipment of Ships carrying Dangerous Chemicals in Bulk
IC50 -Half maximal inhibitory concentration
ICAO - International Civil Aviation Organiza- tion
IECSC - Inventory of Existing Chemical Substances in China
IMDG - Interna- tional Maritime Dangerous Goods
IMO - International Maritime Organization
ISHL -Industrial Safety and Health Law (Japan)
ISO - International Organisation forStandardization
KECI - Korea Existing Chemicals Inventory
LC50 - Lethal Concen- tration to 50 % of a test population
LD50 - Lethal Dose to 50% of a test population (Median Lethal Dose)
MARPOL - International Convention for the Prevention of Pol- lution from Ships
n.o.s. - Not Otherwise Specified
Nch - Chilean Norm
NO(A)EC -No Observed (Adverse) Effect Concentration
NO(A)EL - No Observed (Adverse) Ef- fect Level
NOELR - No Observable Effect Loading Rate
NOM - Official MexicanNorm
NTP - National Toxicology Program
NZIoC - New Zealand Inventory of Chem- icals
OECD - Organization for Economic Co-operation and Development
OPPTS - Of- fice of Chemical Safety and Pollution Prevention
PBT - Persistent, Bioaccumulative and Toxic substance
PICCS - Philippines Inventory of Chemicals and Chemical Sub- stances
(Q)SAR - (Quantitative) Structure Activity Relationship
REACH - Regulation (EC) No 1907/2006 of the European Parliament and of the Council concerning theRegistration, Evaluation, Authorisation and Restriction of Chemicals
SADT - Self-Accelerating Decomposition Temperature
SDS - Safety Data Sheet
TCSI - TaiwanChemical Substance Inventory
TDG - Transportation of Dangerous Goods
TECI -Thailand Existing Chemicals Inventory
TSCA - Toxic Substances Control Act (UnitedStates)
UN - United Nations
UNRTDG - United Nations Recommendations on theTransport of Dangerous Goods
vPvB - Very Persistent and Very Bioaccumulative
WHMIS - Workplace Hazardous Materials Information System
ANTT - National Agency forTransport by Land of Brazil
ASTM - American Society for the Testing of Materials
bw - Body weight
CMR - Carcinogen, Mutagen or Reproductive Toxicant
DIN -Standard of the German Institute for Standardisation
DSL - Domestic SubstancesList (Canada)
ECx - Concentration associated with x% response
ELx - Loading rate associated with x% response
EmS - Emergency Schedule
ENCS - Existing and NewChemical Substances (Japan)
ErCx - Concentration associated with x% growth rate response
ERG - Emergency Response Guide
GHS - Globally Harmonized System
GLP - Good Laboratory Practice
IARC - International Agency for Research on Can- cer
IATA - International Air Transport Association
IBC - International Code for theConstruction and Equipment of Ships carrying Dangerous Chemicals in Bulk
IC50 -Half maximal inhibitory concentration
ICAO - International Civil Aviation Organiza- tion
IECSC - Inventory of Existing Chemical Substances in China
IMDG - Interna- tional Maritime Dangerous Goods
IMO - International Maritime Organization
ISHL -Industrial Safety and Health Law (Japan)
ISO - International Organisation forStandardization
KECI - Korea Existing Chemicals Inventory
LC50 - Lethal Concen- tration to 50 % of a test population
LD50 - Lethal Dose to 50% of a test population (Median Lethal Dose)
MARPOL - International Convention for the Prevention of Pol- lution from Ships
n.o.s. - Not Otherwise Specified
Nch - Chilean Norm
NO(A)EC -No Observed (Adverse) Effect Concentration
NO(A)EL - No Observed (Adverse) Ef- fect Level
NOELR - No Observable Effect Loading Rate
NOM - Official MexicanNorm
NTP - National Toxicology Program
NZIoC - New Zealand Inventory of Chem- icals
OECD - Organization for Economic Co-operation and Development
OPPTS - Of- fice of Chemical Safety and Pollution Prevention
PBT - Persistent, Bioaccumulative and Toxic substance
PICCS - Philippines Inventory of Chemicals and Chemical Sub- stances
(Q)SAR - (Quantitative) Structure Activity Relationship
REACH - Regulation (EC) No 1907/2006 of the European Parliament and of the Council concerning theRegistration, Evaluation, Authorisation and Restriction of Chemicals
SADT - Self-Accelerating Decomposition Temperature
SDS - Safety Data Sheet
TCSI - TaiwanChemical Substance Inventory
TDG - Transportation of Dangerous Goods
TECI -Thailand Existing Chemicals Inventory
TSCA - Toxic Substances Control Act (UnitedStates)
UN - United Nations
UNRTDG - United Nations Recommendations on theTransport of Dangerous Goods
vPvB - Very Persistent and Very Bioaccumulative
WHMIS - Workplace Hazardous Materials Information System
Disclaimer:
The information in this MSDS is only applicable to the specified product, unless otherwise specified, it is not applicable to the mixture of this product and other substances. This MSDS only provides information on the safety of the product for those who have received the appropriate professional training for the user of the product. Users of this MSDS must make independent judgments on the applicability of this SDS. The authors of this MSDS will not be held responsible for any harm caused by the use of this MSDS.