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Home> CAS DataBase Listed 1   -> 4-Acetamidophenol Material Safety Data Sheet(MSDS)

CAS No. 103-90-2 (4-Acetamidophenol)

  • CAS No: 103-90-2
  • Molecular Weight: 151.16256
  • Molecular Formula: C8H9NO2
Properties Safety and Handling Reach Info MSDS NMR Spectrum Synthesis Route Precursor and Product Computational chemical data

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According to Globally Harmonized System of Classification and Labelling of Chemicals (GHS) - Sixth revised edition

Version: 1.0

Creation Date: Aug 10, 2017

Revision Date: Aug 10, 2017


1.1 GHS Product identifier

Product name paracetamol

1.2 Other means of identification

Product number -
Other names APAP

1.3 Recommended use of the chemical and restrictions on use

Identified uses For industry use only.
Uses advised against no data available

1.4 Supplier's details

Company WWW.GuideChem.COM
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Telephone +86-571-89739798
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1.5 Emergency phone number

Emergency phone number +86-571-89739798
Service hours Monday to Friday, 9am-5pm (Standard time zone: UTC/GMT +8 hours).

2.Hazard identification

2.1 Classification of the substance or mixture

Acute toxicity - Oral, Category 4

Skin irritation, Category 2

Skin sensitization, Category 1B

Eye irritation, Category 2

2.2 GHS label elements, including precautionary statements

Signal word


Hazard statement(s)

H302 Harmful if swallowed

H315 Causes skin irritation

H317 May cause an allergic skin reaction

H319 Causes serious eye irritation

Precautionary statement(s)

P264 Wash ... thoroughly after handling.

P270 Do not eat, drink or smoke when using this product.

P280 Wear protective gloves/protective clothing/eye protection/face protection.

P261 Avoid breathing dust/fume/gas/mist/vapours/spray.

P272 Contaminated work clothing should not be allowed out of the workplace.


P301+P312 IF SWALLOWED: Call a POISON CENTER/doctor/\u2026if you feel unwell.

P330 Rinse mouth.

P302+P352 IF ON SKIN: Wash with plenty of water/...

P321 Specific treatment (see ... on this label).

P332+P313 If skin irritation occurs: Get medical advice/attention.

P362+P364 Take off contaminated clothing and wash it before reuse.

P333+P313 If skin irritation or rash occurs: Get medical advice/attention.

P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.

P337+P313 If eye irritation persists: Get medical advice/attention.




P501 Dispose of contents/container to ...

2.3 Other hazards which do not result in classification


3.Composition/information on ingredients

3.1 Substances

Chemical name Common names and synonyms CAS number EC number Concentration
paracetamol paracetamol 103-90-2 none 100%

4.First-aid measures

4.1 Description of necessary first-aid measures

General advice

Consult a physician. Show this safety data sheet to the doctor in attendance.

If inhaled

Fresh air, rest.

In case of skin contact

Rinse and then wash skin with water and soap.

In case of eye contact

Rinse with plenty of water (remove contact lenses if easily possible).

If swallowed

Give one or two glasses of water to drink.

4.2 Most important symptoms/effects, acute and delayed

SYMPTOMS: Symptoms of overexposure to this compound include nausea, vomiting, cyanosis from methemoglobinemia, injury to the liver, kidneys, central nervous system and heart, circulatory collapse, drowsiness, confusion, liver tenderness, low blood pressure, cardiac arrhythmias, jaundice, acute renal failure, death due to liver necrosis, metabolic acidosis, hepatic damage and cirrhosis. Other symptoms include changes in exocrine pancreas, diarrhea, irritability, somnolence, general anesthesia, fever and hepatitis. Diaphoresis and general malaise may occur. Exposure may lead to hematological reactions and, occasionally, skin rashes and other allergic reactions. The rash is usually erythematous or urticarial, but sometimes it is more serious and may be accompanied by drug fever and mucosal lesions. Exposure to large amounts may lead to pallor, anorexia, abdominal pain, abnormalities of glucose metabolism and hepatic encephalopathy. It may also lead to epigastric pain, sweating, paresthesias of distal extremities, muscular aching, weakness, dizziness, central nervous system depression (rare), pain in the upper right quadrant, enlarged liver, oliguria, anuria, coagulation defects and myocardiopathy characterized by ST segment abnormalities, T-wave flattening and pericarditis. This compound can cause purpura, generalized bleeding and hypoglycemia. It can also cause neutropenia, pancytopenia, leukopenia, thrombocytopenia and nephrotoxicity. Other symptoms may include wheezing, general discomfort, blood changes including many anemias (aplastic anemia), central nervous system stimulation, swollen tongue, rapid pulse, skin eruptions, chills, excitement, delirium, vascular collapse and convulsions. Irritation of the skin, eyes, mucous membranes and upper respiratory tract may occur. ACUTE/CHRONIC HAZARDS: This compound may be harmful by ingestion and inhalation. It may cause irritation of the skin, eyes, mucous membranes and upper respiratory tract. When heated to decomposition it emits toxic fumes of carbon monoxide, carbon dioxide and nitrogen oxides.

4.3 Indication of immediate medical attention and special treatment needed, if necessary

Emergency and supportive measures. Spontaneous vomiting may delay the oral administration of antidote or charcoal and can be treated with metoclopramide or a serotonin receptor antagonist such as ondansetron. Provide general supportive care for hepatic or renal failure if it occurs. Emergency liver transplant may be necessary for fulminant hepatic failure. Encephalopathy, metabolic acidosis, hypoglycemia, and a progressive rise in the prothrombin time are indications of severe liver injury.

5.Fire-fighting measures

5.1 Extinguishing media

Suitable extinguishing media

Suitable extinguishing media: Use water spray, alcohol-resistant foam, dry chemical or carbon dioxide. Special protective equipment for firefighters: Wear self contained breathing apparatus for fire fighting if necessary.

5.2 Specific hazards arising from the chemical

Flash point data for this chemical are not available; however, it is probably combustible.

5.3 Special protective actions for fire-fighters

Wear self-contained breathing apparatus for firefighting if necessary.

6.Accidental release measures

6.1 Personal precautions, protective equipment and emergency procedures

Use personal protective equipment. Avoid dust formation. Avoid breathing vapours, mist or gas. Ensure adequate ventilation. Evacuate personnel to safe areas. Avoid breathing dust. For personal protection see section 8.

6.2 Environmental precautions

Personal protection: particulate filter respirator adapted to the airborne concentration of the substance. Sweep spilled substance into covered containers. If appropriate, moisten first to prevent dusting. Do NOT let this chemical enter the environment.

6.3 Methods and materials for containment and cleaning up

Personal precautions: Use personal protective equipment. Avoid dust formation. Avoid breathing vapors, mist or gas. Ensure adequate ventilation. Evacuate personnel to safe areas. Avoid breathing dust. Environmental precautions: Prevent further leakage or spillage if safe to do so. Do not let product enter drains. Discharge into the environment must be avoided. Methods and materials for containment and cleaning up: Pick up and arrange disposal without creating dust. Sweep up and shovel. Keep in suitable, closed containers for disposal.

7.Handling and storage

7.1 Precautions for safe handling

Avoid contact with skin and eyes. Avoid formation of dust and aerosols. Avoid exposure - obtain special instructions before use.Provide appropriate exhaust ventilation at places where dust is formed. For precautions see section 2.2.

7.2 Conditions for safe storage, including any incompatibilities

Provision to contain effluent from fire extinguishing. Store in an area without drain or sewer access.Keep container tightly closed in a dry and well-ventilated place. Keep in a dry place.

8.Exposure controls/personal protection

8.1 Control parameters

Occupational Exposure limit values

no data available

Biological limit values

no data available

8.2 Appropriate engineering controls

Handle in accordance with good industrial hygiene and safety practice. Wash hands before breaks and at the end of workday.

8.3 Individual protection measures, such as personal protective equipment (PPE)

Eye/face protection

Safety glasses with side-shields conforming to EN166. Use equipment for eye protection tested and approved under appropriate government standards such as NIOSH (US) or EN 166(EU).

Skin protection

Wear impervious clothing. The type of protective equipment must be selected according to the concentration and amount of the dangerous substance at the specific workplace. Handle with gloves. Gloves must be inspected prior to use. Use proper glove removal technique(without touching glove's outer surface) to avoid skin contact with this product. Dispose of contaminated gloves after use in accordance with applicable laws and good laboratory practices. Wash and dry hands. The selected protective gloves have to satisfy the specifications of EU Directive 89/686/EEC and the standard EN 374 derived from it.

Respiratory protection

Wear dust mask when handling large quantities.

Thermal hazards

no data available

9.Physical and chemical properties

Physical state White Solid
Colour Large monoclinic prisms from water
Odour Odorless
Melting point/ freezing point 205\u00b0C(dec.)(lit.)
Boiling point or initial boiling point and boiling range 144\u00b0C/12mmHg(lit.)
Flammability Combustible.
Lower and upper explosion limit / flammability limit no data available
Flash point 31\u00b0C(lit.)
Auto-ignition temperature 540\u00b0C
Decomposition temperature no data available
pH Saturated aqueous solution: 5.5-6.5
Kinematic viscosity no data available
Solubility In water:14 g/L (20 \u00baC)
Partition coefficient n-octanol/water (log value) no data available
Vapour pressure 6.29X10-5 mm Hg at 25\u00b0C
Density and/or relative density 1,293 g/cm3
Relative vapour density (air = 1): 5.2
Particle characteristics no data available

10.Stability and reactivity

10.1 Reactivity

no data available

10.2 Chemical stability

Stable under recommended storage conditions.

10.3 Possibility of hazardous reactions

Not flammable or combustible.4-HYDROXYACETANILIDE is sensitive to light. Incompatible with strong oxidizers. .

10.4 Conditions to avoid

no data available

10.5 Incompatible materials

Oxidizing agents

10.6 Hazardous decomposition products

Hazardous decomposition products formed under fire conditions. - Carbon oxides, nitrogen oxides (NOx).

11.Toxicological information

Acute toxicity

  • Oral: LD50 Rat oral 2400 mg/kg
  • Inhalation: no data available
  • Dermal: no data available

Skin corrosion/irritation

no data available

Serious eye damage/irritation

no data available

Respiratory or skin sensitization

no data available

Germ cell mutagenicity

no data available


Evaluation: There is inadequate evidence in humans for the carcinogenicity of paracetamol. There is inadequate evidence in experimental animals for the carcinogenicity of paracetamol. Overall evaluation: Paracetamol is not classifiable as to its carcinogenicity to humans (Group 3).

Reproductive toxicity

no data available

STOT-single exposure

no data available

STOT-repeated exposure

no data available

Aspiration hazard

no data available

12.Ecological information

12.1 Toxicity

  • Toxicity to fish: LC50; Species: Pimephales promelas (Fathead minnow) age 33 days, length 24.6 mm, weight 0.246 g; Conditions: flow through, 24.7\u00b0C, dissolved oxygen 5.9 mg/L, hardness 51.0 mg/L CaCO3, alkalinity 45.0 mg/L CaCO3, pH 7.4; Concentration: 814 mg/L for 96 hr /99% purity
  • Toxicity to daphnia and other aquatic invertebrates: EC50; Species: Daphnia magna (Water Flea) age 6-24 hr; Conditions: freshwater, static, 20\u00b0C, pH > or =7.0; Concentration: 13000 ug/L for 24 hr (95% confidence interval: 6000-32000 ug/L); Effect: intoxication, immobilization /formulated product
  • Toxicity to algae: no data available
  • Toxicity to microorganisms: no data available

12.2 Persistence and degradability

AEROBIC: Acetaminophen has been categorized as readily biodegradable following acclimation(1). A half-life of 20 days has been reported for acetaminophen using an activated sludge inoculum(2). Half-lives of 40 and 17 days were observed when using activated sludge inoculums acclimated to phenol(3) and cresol(4), respectively. Acetaminophen reached 94% of its theoretical BOD in 6 days using an activated sludge inoculum and the Zahn-Wellens test(5). The rate constants for non-adapted, phenol-adapted, and cresol-adapted activated sludge (sludge concentrations of 500, 10, and 50 mg/L) were 0.141X10-2, 0.713X10-3, and 0.215X10-2 1/hr, respectively(6); half-lives are 21, 40, and 13 days, respectively(SRC). Acetaminophen, present at 100 ug/L, exhibited biodegradation rates of 0.014/hr and 0.00051/hr in 5 days using Tamlya and Tsumeta River water (Japan), respectively, and the OECD 301-A river die-away test. The corresponding half-lives are 50 and 1400 hours, respectively(7).

12.3 Bioaccumulative potential

An estimated BCF of 3 was calculated in fish for acetaminophen(SRC), using a log Kow of 0.46(1) and a regression-derived equation(2). According to a classification scheme(3), this BCF suggests the potential for bioconcentration in aquatic organisms is low(SRC).

12.4 Mobility in soil

The Koc of acetaminophen is estimated as 21(SRC), using a log Kow of 0.46(1) and a regression-derived equation(2). According to a classification scheme(3), this estimated Koc value suggests that acetaminophen is expected to have very high mobility in soil. The pKa of acetaminophen is 9.38(4), indicating that this compound will exist partially in the anion form in the environment and anions generally adsorb less strongly to soils containing organic carbon and clay than their neutral counterparts(5). However, low mobilty was observed in soils with a high organic content. Kd values of 46 and 36 in clayey silt and silty sand, respectively, have been reported when the test compound was applied in standard dilution(6). Kd values of 45 and 41 in clayey silt and silty sand, respectively, have been reported when acetaminophen was applied as a test sludge; the average Kd value of 42 indicated low mobility(6). Acetaminophen, present at <0.009 ug/L, was not detected in leachate water (treated effluent from a muncipal wastewater treatment facility) following a 23-day soil column leaching experiment using Mohall-Laveen sandy loam (detection limit = 0.009 ug/L)(7).

12.5 Other adverse effects

no data available

13.Disposal considerations

13.1 Disposal methods


The material can be disposed of by removal to a licensed chemical destruction plant or by controlled incineration with flue gas scrubbing. Do not contaminate water, foodstuffs, feed or seed by storage or disposal. Do not discharge to sewer systems.

Contaminated packaging

Containers can be triply rinsed (or equivalent) and offered for recycling or reconditioning. Alternatively, the packaging can be punctured to make it unusable for other purposes and then be disposed of in a sanitary landfill. Controlled incineration with flue gas scrubbing is possible for combustible packaging materials.

14.Transport information

14.1 UN Number

ADR/RID: UN3077 IMDG: UN3077 IATA: UN3077

14.2 UN Proper Shipping Name


14.3 Transport hazard class(es)


14.4 Packing group, if applicable


14.5 Environmental hazards

ADR/RID: no IMDG: no IATA: no

14.6 Special precautions for user

no data available

14.7 Transport in bulk according to Annex II of MARPOL 73/78 and the IBC Code

no data available

15.Regulatory information

15.1 Safety, health and environmental regulations specific for the product in question

Chemical name Common names and synonyms CAS number EC number
paracetamol paracetamol 103-90-2 none
European Inventory of Existing Commercial Chemical Substances (EINECS) Listed.
EC Inventory Listed.
United States Toxic Substances Control Act (TSCA) Inventory Listed.
China Catalog of Hazardous chemicals 2015 Not Listed.
New Zealand Inventory of Chemicals (NZIoC) Listed.
Philippines Inventory of Chemicals and Chemical Substances (PICCS) Listed.
Vietnam National Chemical Inventory Listed.
Chinese Chemical Inventory of Existing Chemical Substances (China IECSC) Listed.

16.Other information

Information on revision

Creation Date Aug 10, 2017
Revision Date Aug 10, 2017

Abbreviations and acronyms

  • CAS: Chemical Abstracts Service
  • ADR: European Agreement concerning the International Carriage of Dangerous Goods by Road
  • RID: Regulation concerning the International Carriage of Dangerous Goods by Rail
  • IMDG: International Maritime Dangerous Goods
  • IATA: International Air Transportation Association
  • TWA: Time Weighted Average
  • STEL: Short term exposure limit
  • LC50: Lethal Concentration 50%
  • LD50: Lethal Dose 50%
  • EC50: Effective Concentration 50%


  • IPCS - The International Chemical Safety Cards (ICSC), website:
  • HSDB - Hazardous Substances Data Bank, website:
  • IARC - International Agency for Research on Cancer, website:
  • eChemPortal - The Global Portal to Information on Chemical Substances by OECD, website:
  • CAMEO Chemicals, website:
  • ChemIDplus, website:
  • ERG - Emergency Response Guidebook by U.S. Department of Transportation, website:
  • Germany GESTIS-database on hazard substance, website:
  • ECHA - European Chemicals Agency, website:

Disclaimer: The above information is believed to be correct but does not purport to be all inclusive and shall be used only as a guide. The information in this document is based on the present state of our knowledge and is applicable to the product with regard to appropriate safety precautions. It does not represent any guarantee of the properties of the product. We as supplier shall not be held liable for any damage resulting from handling or from contact with the above product.

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