English Safety Data Sheet Database 中文版 MSDS

4-ethoxyaniline

CAS No. 156-43-4 | PubChem CID 9076
Section 1. Identification
Chemical Name4-ethoxyaniline CAS No.156-43-4
Synonyms4-aminophenetole;p-phenet-idine Chinese Name4-乙氧基苯胺
Molecular Formula(C_8H_11N()) Molecular Weight137.179
UN No.2311 Data SourcePubChem (NIH/NLM)
GHS Hazard Classification
Signal Word WARNING
Pictograms GHS06 · Acute Toxic GHS07 · Irritant GHS08 · Health Hazard GHS09 · Environmental Hazard
Hazard Statements H302H312H317H319H332H341H361H372H401H411H313H316H331H373
Precautionary Statements P203P261P264P264+P265P270P271P272P280P301+P317P302+P352P304+P340P305+P351+P338P317P318P321P330P333+P317P337+P317P362+P364P405P501P260P273P319P391P302+P317P316P332+P317P403+P233

Section 2. Hazards Identification

H302: Harmful if swallowed [Warning Acute toxicity, oral]

H312: Harmful in contact with skin [Warning Acute toxicity, dermal]

H317: May cause an allergic skin reaction [Warning Sensitization, Skin]

H319: Causes serious eye irritation [Warning Serious eye damage/eye irritation]

H332: Harmful if inhaled [Warning Acute toxicity, inhalation]

H341: Suspected of causing genetic defects [Warning Germ cell mutagenicity]

P203, P261, P264, P264+P265, P270, P271, P272, P280, P301+P317, P302+P352, P304+P340, P305+P351+P338, P317, P318, P321, P330, P333+P317, P337+P317, P362+P364, P405, and P501 (click each P-code to see the statement)

H302 (100%): Harmful if swallowed [Warning Acute toxicity, oral]

H312 (99.9%): Harmful in contact with skin [Warning Acute toxicity, dermal]

H317 (99.9%): May cause an allergic skin reaction [Warning Sensitization, Skin]

H319 (100%): Causes serious eye irritation [Warning Serious eye damage/eye irritation]

H332 (98.3%): Harmful if inhaled [Warning Acute toxicity, inhalation]

H341 (> 99.9%): Suspected of causing genetic defects [Warning Germ cell mutagenicity]

Aggregated GHS information provided per 2230 reports by companies from 9 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.

Information may vary between notifications depending on impurities, additives, and other factors. The percentage value in parenthesis indicates the notified classification ratio from companies that provide hazard codes. Only hazard codes with percentage values above 10% are shown. For more detailed information, please visit ECHA C&L website.

H361: Suspected of damaging fertility or the unborn child [Warning Reproductive toxicity]

H372: Causes damage to organs through prolonged or repeated exposure [Danger Specific target organ toxicity, repeated exposure]

H401: Toxic to aquatic life [Hazardous to the aquatic environment, acute hazard]

H411: Toxic to aquatic life with long lasting effects [Hazardous to the aquatic environment, long-term hazard]

P203, P260, P261, P264, P264+P265, P270, P272, P273, P280, P302+P352, P305+P351+P338, P318, P319, P321, P333+P317, P337+P317, P362+P364, P391, P405, and P501 (click each P-code to see the statement)

H313: May be harmful in contact with skin [Warning Acute toxicity, dermal]

H316: Causes mild skin irritation [Warning Skin corrosion/irritation]

H331: Toxic if inhaled [Danger Acute toxicity, inhalation]

P203, P260, P261, P264, P264+P265, P270, P271, P272, P280, P301+P317, P302+P317, P302+P352, P304+P340, P305+P351+P338, P316, P318, P319, P321, P330, P332+P317, P333+P317, P337+P317, P362+P364, P403+P233, P405, and P501 (click each P-code to see the statement)

H373: May causes damage to organs through prolonged or repeated exposure [Warning Specific target organ toxicity, repeated exposure]

P203, P260, P261, P264, P264+P265, P270, P271, P272, P280, P301+P317, P302+P352, P304+P340, P305+P351+P338, P317, P318, P319, P321, P330, P333+P317, P337+P317, P362+P364, P405, and P501 (click each P-code to see the statement)

Section 4. First-Aid Measures

Fresh air, rest.

Remove contaminated clothes. Rinse and then wash skin with water and soap.

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

Rinse mouth. Seek medical attention if you feel unwell.

EYES: First check the victim for contact lenses and remove if present. Flush victim's eyes with water or normal saline solution for 20 to 30 minutes while simultaneously calling a hospital or poison control center. Do not put any ointments, oils, or medication in the victim's eyes without specific instructions from a physician. IMMEDIATELY transport the victim after flushing eyes to a hospital even if no symptoms (such as redness or irritation) develop.

SKIN: IMMEDIATELY flood affected skin with water while removing and isolating all contaminated clothing. Gently wash all affected skin areas thoroughly with soap and water. If symptoms such as redness or irritation develop, IMMEDIATELY call a physician and be prepared to transport the victim to a hospital for treatment.

INHALATION: IMMEDIATELY leave the contaminated area; take deep breaths of fresh air. If symptoms (such as wheezing, coughing, shortness of breath, or burning in the mouth, throat, or chest) develop, call a physician and be prepared to transport the victim to a hospital. Provide proper respiratory protection to rescuers entering an unknown atmosphere. Whenever possible, Self-Contained Breathing Apparatus (SCBA) should be used; if not available, use a level of protection greater than or equal to that advised under Protective Clothing.

INGESTION: DO NOT INDUCE VOMITING. If the victim is conscious and not convulsing, give 1 or 2 glasses of water to dilute the chemical and IMMEDIATELY call a hospital or poison control center. Be prepared to transport the victim to a hospital if advised by a physician. If the victim is convulsing or unconscious, do not give anything by mouth, ensure that the victim's airway is open and lay the victim on his/her side with the head lower than the body. DO NOT INDUCE VOMITING. IMMEDIATELY transport the victim to a hospital. (NTP, 1992)

Section 5. Fire-Fighting Measures

Fires involving this material can be controlled with a dry chemical, carbon dioxide or Halon extinguisher. (NTP, 1992)

Use powder, alcohol-resistant foam, water spray, carbon dioxide.

Section 6. Accidental Release Measures

Excerpt from ERG Guide 153 [Substances - Toxic and/or Corrosive (Combustible)]:

IMMEDIATE PRECAUTIONARY MEASURE: Isolate spill or leak area in all directions for at least 50 meters (150 feet) for liquids and at least 25 meters (75 feet) for solids.

SPILL: Increase the immediate precautionary measure distance, in the downwind direction, as necessary.

FIRE: If tank, rail tank car or highway tank is involved in a fire, ISOLATE for 800 meters (1/2 mile) in all directions; also, consider initial evacuation for 800 meters (1/2 mile) in all directions. (ERG, 2024)

Personal protection: filter respirator for organic gases and vapours adapted to the airborne concentration of the substance. Collect leaking liquid in sealable containers. Absorb remaining liquid in sand or inert absorbent. Then store and dispose of according to local regulations.

Section 7. Handling and Storage

SMALL SPILLS AND LEAKAGE: If you spill this chemical, FIRST REMOVE ALL SOURCES OF IGNITION. Then, use absorbent paper to pick up all liquid spill material. Your contaminated clothing and absorbent paper should be sealed in a vapor-tight plastic bag for eventual disposal. Solvent wash all contaminated surfaces with 60-70% ethanol followed by washing with a soap and water solution. Do not reenter the contaminated area until the Safety Officer (or other responsible person) has verified that the area has been properly cleaned.

STORAGE PRECAUTIONS: You should protect this chemical from exposure to light. Keep the container tightly closed under an inert atmosphere, and store under refrigerated temperatures. STORE AWAY FROM SOURCES OF IGNITION. (NTP, 1992)

Separated from strong oxidants and food and feedstuffs.

Section 8. Exposure Controls / Personal Protection

No indication can be given about the rate at which a harmful concentration of this substance in the air is reached on evaporation at 20 °C.

The substance is irritating to the eyes.

The substance may have effects on the blood. This may result in the formation of methaemoglobin.

RECOMMENDED RESPIRATOR: Where the neat test chemical is weighed and diluted, wear a NIOSH-approved half face respirator equipped with an organic vapor/acid gas cartridge (specific for organic vapors, HCl, acid gas and SO2) with a dust/mist filter. (NTP, 1992)

NO open flames.

Avoid inhalation of mist.

Protective gloves.

Wear safety goggles.

Do not eat, drink, or smoke during work.

Section 9. Physical and Chemical Properties

P-phenetidine is a colorless to dark red liquid. (NTP, 1992)

Colorless liquid; Turns red to brown on air and light exposure; [Merck Index] Brown liquid with an unpleasant odor; [Alfa Aesar MSDS]

COLOURLESS LIQUID. TURNS DARK RED ON EXPOSURE TO AIR AND LIGHT.

482 °F at 760 mmHg (NTP, 1992)

253-255 °C

36 to 39 °F (NTP, 1992)

240 °F (NTP, 1992)

120 °C c.c.

5 to 10 mg/mL at 68 °F (NTP, 1992)

Solubility in water, g/100ml at 20 °C: 2 (moderate)

1.0652 at 61 °F (NTP, 1992) - Denser than water; will sink

1.1 g/cm³

Relative density of the vapour/air-mixture at 20 °C (air = 1): 1.0

4.73 (NTP, 1992) - Heavier than air; will sink (Relative to Air)

Relative vapor density (air = 1): 4.7

3.48 mmHg at 77 °F (NTP, 1992)

0.01 [mmHg]

Vapor pressure, Pa at 50 °C: 10

139.8 Ų [M+H]+ [CCS Type: DT; Buffer gas: N2; Ionization: ESI+; Dataset: TOXCAST; Source Identifier: DTXSID0025864]

Boiling point

Diamagnetic susceptibility

Dielectric constant

Fusion temperature

Heat of sublimation

Magnetic susceptibility

Melting temperature

Nuclear quadrupole resonance spectroscopy

Optical coefficient

Phase transition

Quadrupole coupling

Refractive index

Transition enthalpy

Vapor pressure

Viscosity

Nitrogen Compounds -> Amines, Aromatic

Section 10. Stability and Reactivity

Very sensitive to exposure to air and light. Turns red to brown on exposure to light and air. (NTP, 1992). Slightly soluble in water.

Amines, Aromatic

P-PHENETIDINE reacts vigorously with powerful oxidizers.

Section 11. Toxicological Information

The substance can be absorbed into the body by inhalation of its vapour and by ingestion.

Redness.

Methemoglobinemia - The presence of increased methemoglobin in the blood; the compound is classified as secondary toxic effect

Skin Sensitizer - An agent that can induce an allergic reaction in the skin.

LCLo (rat) = 487 mg/m3/4hr

Environmental effects from the substance have not been investigated adequately.

Section 12. Ecological Information

Environmental effects from the substance have not been investigated adequately.

Section 14. Transport Information

Do not transport with food and feedstuffs.

Symbol: Xn; R: 20/21/22-36-43-68; S: (2)-36/37-46

UN Hazard Class: 6.1; UN Pack Group: III

Source: PubChem CID 9076 (NIH/NLM, public domain). Retrieved from PubChem, a public-domain chemistry database maintained by the U.S. National Library of Medicine. Last updated: 2026-08-02 10:07:25.
Disclaimer: This information is compiled for reference only and does not replace the manufacturer's official Safety Data Sheet. Always consult the supplier's SDS before handling any chemical.