What is the density of methanol?

Methanol is the simplest saturated monohydric alcohol, also known as "lignin alcohol" or "lignin". The CAS numbers are 67-56- 1, 170082- 17-4, with a molecular weight of 32.04 and a boiling point of 64.7℃. Methanol is also flammable, and its vapor can form an explosive mixture with air. It is a colorless and volatile liquid with an alcohol smell.

The lowest dose of human oral poisoning is about 100 mg/kg body weight, and oral intake of 0.3 ~ 1 g/kg can lead to death. Generally, drinking 15ml by mistake can cause blindness. Toxic by inhalation, skin contact and swallowing. It is usually produced by the reaction of carbon monoxide and hydrogen. It is used to make formaldehyde, essence, dye, medicine, gunpowder, antifreeze and so on. It is a basic organic chemical raw material and high-quality fuel, mainly used in fine chemicals, plastics and other fields.

Basic information

Chinese name

methyl alcohol

Foreign name

methyl alcohol

Another name

Hydroxymethane, lignans, lignans

chemical formula

methyl alcohol

melting point

-97

boiling point

64.7

density

0.7918g/cm?

external

colourless liquid

water-solubility

Completely miscible with water.

CAS number

67-56- 1

flash(ing) point

12

Warning terms

R: 1 1-39/23/24/25

Safety terminology

S:1/2-7-16-36/37-45

RTECS

PC 1400000

mole mass

32.04 g mol? 1

stickiness

0.59 MPa sec at 20℃.

Main danger

Drinking alcohol containing methanol can lead to blindness, liver disease and even death.

relative molecular mass

32

smiling expression

Commander (commanding officer)

Dipole moment

1.69 D (gaseous)

bale

brief introduction

Common name: methanol

Alias: hydroxymethylmethane, lignans, lignans.

English name: methyl, methanol

What medicine is methanol?

Methanol is a colorless, volatile and hygroscopic liquid. Mainly used as raw materials for pesticides, medicines, chemical reagents, industrial solvents, analytical reagents, etc.

What are the uses of methanol?

Methanol can be used as raw material and industrial solvent for pesticides, medicines and chemical reagents.

Methanol can be used as analytical reagent.

Methanol can denature ethanol to prepare industrial ethanol.

Methanol is also used as an extractant for food processing.

What are the preparation and specifications of methanol?

Methanol is often used as a solvent to dissolve the effective components of drugs in clinic. Different specifications of methanol reagent have different contents. For more information, please refer to the reagent description.

Precautionary instructions

Under what circumstances is methanol prohibited?

Methanol is neurotoxic, and it will produce toxic reaction after being ingested through digestive tract, respiratory tract or skin. Methanol vapor can damage human respiratory mucosa and vision. Direct contact with methanol should be avoided.

When should methanol be used with caution?

Pregnant women and lactating women should weigh the advantages and disadvantages, please consult a doctor before using.

Methanol and some drugs can interact and influence each other. If you are using other drugs, please be sure to inform your doctor before using methanol, and ask your doctor if and how to use it.

The drug has an adverse reaction. But don't refuse to take medicine for fear of adverse reactions. You can read the drug instructions carefully or consult a doctor to understand the adverse drug reactions of methanol and make certain psychological preparations.

How should I take medicine?

Methanol is often used as a solvent to dissolve the effective components of drugs in clinic. However, it needs to be protected during use to avoid direct contact or inhalation of methanol vapor.

Matters needing attention during medication

Disposal after methanol poisoning

If the patient ingests methanol within 1 hour, gastric lavage can be considered.

The treatment of metabolic acidosis must be corrected immediately by intravenous infusion of sodium bicarbonate injection.

If you ingest a lot of methanol, it is recommended to use an antidote (ethanol or methylpyrazole) at an early stage. Ethanol can slow down the metabolism of methanol to formaldehyde, formic acid and other toxic metabolites, and adjust the dosage of ethanol to keep the blood ethanol concentration at 1 ~ 1.5mg/ml. As an inhibitor of alcohol dehydrogenase, methylpyrazole can also be used for treatment. It can inhibit the metabolism of methanol into toxic metabolites.

Hemodialysis can be performed to accelerate the removal of methanol and its toxic metabolites. Peritoneal dialysis can also be performed, but the effect is not good.

Hemodialysis must be considered if the concentration of methanol in blood is less than 500 micrograms per milliliter, or severe metabolic acidosis occurs when sodium bicarbonate does not work, or symptoms such as visual impairment, central nervous system toxicity, renal failure and serious electrolyte disorder occur. If hemodialysis is carried out, it is necessary to speed up the input of ethanol or add ethanol to the dialysate to maintain a stable blood ethanol concentration.

Because the oxidation and excretion of methanol will last for several days, the treatment measures should not be stopped prematurely, and patients must be closely observed and monitored. Give appropriate support treatment when necessary.

Folic acid and folic acid have been used to treat methanol poisoning because both of them can increase methanol metabolism.

Because methanol can penetrate the skin and cause systemic toxicity, appropriate precautions must be taken to avoid contact with the skin.

What should I do if there is an adverse drug reaction?

The drug has an adverse reaction. If the adverse reaction is serious, you need to see a doctor. Doctors will decide whether to continue taking drugs or switch to other drugs according to the severity of adverse reactions.

Under what circumstances do I need to see a doctor immediately?

Severe electrolyte disorder.

Renal failure.

Central nervous system toxicity.

Visual impairment.

How should methanol be preserved?

Methanol drugs should be kept indoors in a dark and dry place.

Don't share this medicine with people who have the same symptoms as you.

Keep children away from drugs.

What are the possible adverse reactions of methanol?

Visual impairment.

Abdominal pain.

Headache.

Gastrointestinal dysfunction.

Lumbago, hand and foot pain.

Occasionally manic and convulsive.

Electrolyte disorder.

Renal failure.

Central nervous system toxicity.

Coma.

For other adverse reactions, please read the drug instructions carefully.

What drugs will interact with methanol?

Some drugs may interact with methanol, including prescription drugs, over-the-counter drugs, vaccines, vitamins, traditional Chinese medicine and so on. Please consult a doctor before using these drugs with methanol.

Can I use methanol during pregnancy and lactation?

Women should weigh the advantages and disadvantages during pregnancy and lactation, and please consult a doctor before use.

How to use methanol reasonably

Drugs must be used rationally to avoid abuse. Prescription drugs should be prescribed by doctors, and over-the-counter drugs should be read carefully.

Methanol is often used as a solvent to dissolve the effective components of drugs in clinic. The use of drugs containing methanol must be in accordance with the doctor's advice or read the drug instructions carefully.