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Home> CAS DataBase Listed 1 > CAS 103-90-2
Identification of 103-90-2
  • Name:
  • 4-Acetamidophenol (Related Reference)
  • EINECS:
  • 203-157-5
  • Synonyms:
  • Acetaminophen; 4-Hydroxyacetanilide; Paracetamol; APAP; p-Hydroxyacetanilide; Paracetamol ; 4-Acetamino phenol; Acetaminphen;
  • InChI:
  • InChI=1/C8H9NO2/c1-6(10)9-7-2-4-8(11)5-3-7/h2-5,11H,1H3,(H,9,10)
  • This structure is also available as a 2d Mol file
Safety Data of 103-90-2 Properties of 103-90-2
  • Appearance:
  • white crystalline powder
  • Molecular Weight:
  • 151.16
  • Density:
  • 1.293
  • Boiling Point:
  • 387.8 °C at 760 mmHg
  • Melting Point:
  • 168-172℃
  • Flash Point:
  • 387.8 °C at 760 mmHg
  • Storage Temperature:
  • Store in a cool, dry place. Keep container closed when not in use.
  • Refractive index:
  • 1.619
  • Solubility:
  • miscible
  • Biological Activity:
  • Cyclooxygenase inhibitor; may be selective for COX-3 (IC 50 values are 460, > 1000 and > 1000 μ M for canine COX-3, and murine COX-1 and COX-2 respectively). Widely used analgesic and antipyretic agent.
  • Stability:
  • Stable under normal temperatures and pressures.
  • Usage:
  • Analgesic; antipyretic

  • More>>

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

  • CAS No:103-90-2
  • Molecular Weight: 151.16
  • Molecular Formula: C8H9NO2
Properties Safety and Handling MSDS NMR Spectrum Synthesis Route Precursor and Product
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Precursor and Product
References of 4-Acetamidophenol cas 103-90-2

Toxicity

Organism Test Type Route Reported Dose (Normalized Dose) Effect Source
child LDLo oral 50mg/kg (50mg/kg) CARDIAC: OTHER CHANGES

LUNGS, THORAX, OR RESPIRATION: ACUTE PULMONARY EDEMA

KIDNEY, URETER, AND BLADDER: "CHANGES IN TUBULES (INCLUDING ACUTE RENAL FAILURE, ACUTE TUBULAR NECROSIS)"
American Journal of Emergency Medicine. Vol. 6, Pg. 510, 1988.
child LDLo oral 140mg/kg/7D-I (140mg/kg) BEHAVIORAL: COMA

LIVER: "HEPATITIS (HEPATOCELLULAR NECROSIS), ZONAL"

BLOOD: "CHANGES IN SERUM COMPOSITION (E.G., TP, BILIRUBIN, CHOLESTEROL)"
Medical Journal of Australia. Vol. 171, Pg. 472, 1999.
child LDLo oral 360mg/kg/2D (360mg/kg) GASTROINTESTINAL: NAUSEA OR VOMITING

LIVER: OTHER CHANGES

SKIN AND APPENDAGES (SKIN): "DERMATITIS, OTHER: AFTER SYSTEMIC EXPOSURE"
Journal of Pediatrics. Vol. 92, Pg. 832, 1978.
child TDLo oral 591mg/kg/2D-I (591mg/kg) LIVER: LIVER FUNCTION TESTS IMPAIRED

KIDNEY, URETER, AND BLADDER: "CHANGES IN TUBULES (INCLUDING ACUTE RENAL FAILURE, ACUTE TUBULAR NECROSIS)"

BLOOD: APLASTIC ANEMIA
Clinical Pediatrics Vol. 33, Pg. 42, 1994.
child TDLo oral 801mg/kg (801mg/kg) BEHAVIORAL: GENERAL ANESTHETIC

GASTROINTESTINAL: NAUSEA OR VOMITING

LIVER: OTHER CHANGES
Pediatrics. Vol. 61, Pg. 68, 1978.
dog LDLo intravenous 826mg/kg (826mg/kg) BEHAVIORAL: ANALGESIA Archives Internationales de Pharmacodynamie et de Therapie. Vol. 149, Pg. 571, 1964.
dog LDLo oral 2gm/kg (2000mg/kg) BEHAVIORAL: ALTERED SLEEP TIME (INCLUDING CHANGE IN RIGHTING REFLEX)

BLOOD: CHANGES IN SPLEEN
Iyakuhin Kenkyu. Study of Medical Supplies. Vol. 24, Pg. 602, 1993.
frog LDLo subcutaneous 50mg/kg (50mg/kg) BEHAVIORAL: ALTERED SLEEP TIME (INCLUDING CHANGE IN RIGHTING REFLEX)

LUNGS, THORAX, OR RESPIRATION: OTHER CHANGES

BEHAVIORAL: ATAXIA
Archiv fuer Experimentelle Pathologie und Pharmakologie. Vol. 33, Pg. 216, 1894.
guinea pig LD50 oral 2620mg/kg (2620mg/kg) BEHAVIORAL: ALTERED SLEEP TIME (INCLUDING CHANGE IN RIGHTING REFLEX)

BEHAVIORAL: TREMOR

BEHAVIORAL: SOMNOLENCE (GENERAL DEPRESSED ACTIVITY)
Journal of the American Pharmaceutical Association, Scientific Edition. Vol. 47, Pg. 479, 1958.
human LDLo oral 143mg/kg (143mg/kg) BEHAVIORAL: GENERAL ANESTHETIC British Medical Journal. Vol. 282, Pg. 199, 1981.
human LDLo oral 357mg/kg (357mg/kg) BEHAVIORAL: ANOREXIA (HUMAN

GASTROINTESTINAL: NAUSEA OR VOMITING

BEHAVIORAL: COMA
Lancet. Vol. 1, Pg. 66, 1973.
infant TDLo oral 1440mg/kg/6D (1440mg/kg) BEHAVIORAL: IRRITABILITY

GASTROINTESTINAL: "HYPERMOTILITY, DIARRHEA"
American Journal of Diseases of Children. Vol. 137, Pg. 386, 1983.
mammal (species unspecified) LD50 unreported 891mg/kg (891mg/kg) ? Gigiena i Sanitariya. For English translation, see HYSAAV. Vol. 48(6), Pg. 22, 1983.
mammal (species unspecified) LDLo oral 512mg/kg (512mg/kg) ? United States Patent Document. Vol. #4035499,
man LDLo oral 143mg/kg/24H- (143mg/kg) BEHAVIORAL: ANOREXIA (HUMAN

LIVER: "JAUNDICE, OTHER OR UNCLASSIFIED"

LIVER: "HEPATITIS (HEPATOCELLULAR NECROSIS), ZONAL"
American Journal of Medicine. Vol. 74, Pg. 349, 1983.
man LDLo oral 714mg/kg (714mg/kg) LIVER: OTHER CHANGES Human Toxicology. Vol. 1, Pg. 25, 1981.
man TDLo oral 9286ug/kg (9.286mg/kg) SENSE ORGANS AND SPECIAL SENSES: OTHER: EYE

SENSE ORGANS AND SPECIAL SENSES: OTHER: EAR

SKIN AND APPENDAGES (SKIN): "DERMATITIS, OTHER: AFTER SYSTEMIC EXPOSURE"
Allergy. Vol. 50(Suppl,
man TDLo oral 714mg/kg (714mg/kg) CARDIAC: EKG CHANGES NOT DIAGNOSTIC OF ABOVE Postgraduate Medical Journal. Vol. 69, Pg. 52, 1993.
mouse LD50 intraperitoneal 367mg/kg (367mg/kg) BEHAVIORAL: ANALGESIA Arzneimittel-Forschung. Drug Research. Vol. 15, Pg. 520, 1965.
mouse LD50 oral 338mg/kg (338mg/kg) ? Toxicology and Applied Pharmacology. Vol. 19, Pg. 20, 1971.
mouse LD50 subcutaneous 310mg/kg (310mg/kg) ? Human Toxicology. Vol. 3, Pg. 13S, 1984.
pig LDLo intravenous 1gm/kg (1000mg/kg) LIVER: OTHER CHANGES

KIDNEY, URETER, AND BLADDER: OTHER CHANGES
Veterinary and Human Toxicology. Vol. 30, Pg. 324, 1988.
rat LD50 intraperitoneal 1205mg/kg (1205mg/kg) BEHAVIORAL: SOMNOLENCE (GENERAL DEPRESSED ACTIVITY)

BEHAVIORAL: TREMOR
Studi Sassaresi, Sezione 2. Vol. 57, Pg. 561, 1979.
rat LD50 oral 1944mg/kg (1944mg/kg) ? United States Patent Document. Vol. #4636513,
women LDLo oral 260mg/kg (260mg/kg) BEHAVIORAL: COMA

GASTROINTESTINAL: NAUSEA OR VOMITING

KIDNEY, URETER, AND BLADDER: "CHANGES IN TUBULES (INCLUDING ACUTE RENAL FAILURE, ACUTE TUBULAR NECROSIS)"
JAMA, Journal of the American Medical Association. Vol. 236, Pg. 1874, 1976.
women LDLo oral 400mg/kg (400mg/kg) BEHAVIORAL: COMA

LIVER: LIVER FUNCTION TESTS IMPAIRED
Journal of Toxicology, Clinical Toxicology. Vol. 35, Pg. 325, 1997.
women LDLo oral 650mg/kg (650mg/kg) VASCULAR: BP LOWERING NOT CHARACTERIZED IN AUTONOMIC SECTION

VASCULAR: OTHER CHANGES
American Journal of Emergency Medicine. Vol. 6, Pg. 511, 1988.
women TDLo oral 4962ug/kg (4.962mg/kg) GASTROINTESTINAL: CHANGES IN STRUCTURE OR FUNCTION OF ENDOCRINE PANCREAS

BLOOD: OTHER CHANGES

LIVER: LIVER FUNCTION TESTS IMPAIRED
Journal of Toxicology, Clinical Toxicology. Vol. 29, Pg. 223, 1991.
Link to PubMed
women TDLo oral 13mg/kg (13mg/kg) BEHAVIORAL: EXCITEMENT Allergy. Vol. 50(Suppl,
women TDLo oral 325mg/kg (325mg/kg) BEHAVIORAL: "HALLUCINATIONS, DISTORTED PERCEPTIONS"

KIDNEY, URETER, AND BLADDER: "CHANGES IN TUBULES (INCLUDING ACUTE RENAL FAILURE, ACUTE TUBULAR NECROSIS)"
Postgraduate Medical Journal. Vol. 68, Pg. 116, 1992.
women TDLo oral 490mg/kg (490mg/kg) BEHAVIORAL: SOMNOLENCE (GENERAL DEPRESSED ACTIVITY)

GASTROINTESTINAL: OTHER CHANGES

KIDNEY, URETER, AND BLADDER: OTHER CHANGES
Southern Medical Journal. Vol. 71, Pg. 906, 1978.

Safety

Hazard Codes of Paracetamol (CAS NO.103-90-2):?HarmfulXn
Risk Statements: 22-36/37/38-52/53-40?
R22: 3Harmful if swallowed.?
R36/37/38: Irritating to eyes, respiratory system and skin.?
R52/53: Harmful to aquatic organisms, may cause long-term adverse effects in the aquatic environment.?
R40: Limited evidence of a carcinogenic effect.
Safety Statements: 26-36-61-37/39-22?
S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.?
S36: Wear suitable protective clothing.?
S61: Avoid release to the environment. Refer to special instructions / safety data sheets.?
S37/39: Wear suitable gloves and eye/face protection.?
S22: Do not breathe dust.
WGK Germany: 1
RTECS: AE4200000
HS Code:?29242930

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