MAGNESIUM CARBONATE: is regarded as being a low hazard substance. It may cause mild respiratory irritation. Ingestion may cause some mild, temporary discomfort and diarrhoea.
EYES - Code 1; SKIN - Code 11; INHALED - 14; INGESTED - Code 18
MAGNESIUM CHLORIDE: This substance has a low toxicity but poisoning can occur in individuals with a damaged alimentary tract or impaired renal function.
EYES - Code 2: SKIN - Code 5: INHALED - Code 14: INGESTED - Code 19
MAGNESIUM OXIDE: there is insufficient data on the effects of eye and skin contact. It is an approved food additive. The ingestion of large amounts can damage the alimentary tract and kidneys.
EYES - Code 1; SKIN - Code 11; INHALED - Code 14; INGESTED - Code 18
MAGNESIUM SULPHATE: is an eye, skin and respiratory tract irritant. It is a toxic substance when ingested causing damage to the gastrointestinal system and impaired renal function.
EYES - Code 1; SKIN - Code 4; INHALED - Code 14; INGESTED - Code 18
MANGANESE CHLORIDE: There are no data available on the toxicity of this substance. Handle with care.
EYES - Code 2: SKIN - Code 5: INHALED - Code 14: INGESTED - Code 19
MARTIUS YELLOW: is a nitro dye. It is very toxic and can be absorbed through the skin in doses large enough to cause toxicity. It is an eye, skin and respiratory tract irritant.
EYES - Code 2; SKIN - Code 13; INHALED - Code 16; INGESTED - Code 24
MAY GRUNWALD GIEMSA: is composed of a mixture of dyes which normally includes azure A, azure B and methylene blue. All are quinone-imine dyes in the thiazin sub group and all are very toxic and irritate eyes and skin. The powder is flammable and should never be handled close to heat or naked flame.
EYES - Code 2; SKIN - Code 5; INHALED - Code 16; INGESTED - Code 28
MERCAPTOETHANOL: is a flammable compound that can cause explosive mixtures with air. It is an eye irritant and will cause skin reddening. It is toxic by inhalation or ingestion causing throat irritation, shortness of breath, abdominal pain and nausea.
EYES - Code 2: SKIN - Code 13: INHALED - Code 16: INGESTED - Code 17
MERCURIC CHLORIDE: is toxic and corrosive and may be absorbed into the body by inhalation, ingestion or through the skin. It can cause blurred vision, sore throat, metallic taste, coughing, shortness of breath and laboured breathing. Its toxic effects are cumulative. Large doses which affect the kidneys and the central nervous system can be fatal.
EYES - Code 3; SKIN - Code 7; INHALED - Code 15; INGESTED - Code 27
MERCURIC OXIDE: is a highly toxic substance, its effects are cumulative. It can be absorbed into the body by inhalation or ingestion. It is corrosive to the eyes and respiratory tract and may cause pulmonary oedema. Significant exposure may be fatal.
EYES - Code 2; SKIN - Code 5; INHALED - Code 16; INGESTED - Code 24
METANIL YELLOW: is a monoazo dye. Its effects upon humans have not been quantified but other dyes in this group are carcinogenic. Handle with care.
EYES - Code 3; SKIN - Code 13; INHALED - Code 15; INGESTED - Code 20
METHANOL: is a flammable liquid and should never be handled close to heat or naked flame. The vapour is heavier than air and can travel for a considerable distance along the ground to a source of ignition and flash back. It has a mutagenic effect upon animals and should never be handled during pregnancy. The vapour and liquid are eye, skin and mucous membrane irritants and central nervous system depressants. They are narcotics and can cause death. The liquid defats skin, may give rise to dermatitis and can be absorbed through the skin in doses large enough to cause narcosis. Inhalation of 800 to 1000 ppm of vapour is sufficient to cause blindness. Exposure to 50,000 ppm for 1 to 2 hours will result in death.
EYES - Code 3; SKIN - Code 13; INHALED - Code 16; INGESTED - Code 28
METHENAMINE (hexamethylenetetramine): is a flammable solid and should not be handled or stored close to heat or naked flame. It is an eye, skin and mucous membrane irritant. Formaldehyde is liberated after acid hydrolysis and if ingested will cause severe gastrointestinal upsets. Cystitis, haematuria and renal lesions may be produced.
EYES - Code 2; SKIN - Code 5; INHALED - Code 14; INGESTED - Code 21
2-METHOXYETHANOL: is a flammable substance and should never be handled close to heat or naked flame. The vapour is heavier than air and can travel along the ground for a considerable distance to a source of ignition and flash back. It is an irritant and a neurotoxin. It is also a teratogen and should not be handled during pregnancy. This is a very dangerous substance and should be handled with the greatest of care.
EYES - Code 3; SKIN - Code 5; INHALED - Code 15; INGESTED - Code 21
METHYL ACETATE: is an eye, skin and mucous membrane irritant. Inhalation or ingestion may cause central nervous system depression, headache, drowsiness and dizziness. Severe exposure may cause death.
EYES - Code 2: SKIN - Code 12: INHALED - Code 15: INGESTED - Code 21
METHYL BLUE: is a triaminotriphenylmethane dye. It is a combustible powder and should never be handled close to heat or naked flame. Its toxicity has not been quantified but other dyes in this group are carcinogenic. Handle with care.
EYES - Code 2; SKIN - Code 12; INHALED - Code 16; INGESTED - Code 24
METHYL CELLULOSE: is dissolved in a solution of equal parts absolute ethanol and diethyl ether. As such it is highly flammable and should never be handled close to heat or naked flame. (Diethyl ether vapour is heavier than air and can travel for a considerable distance along the ground to a source of ignition and flash back. It is an eye, skin and mucous membrane irritant and has narcotic properties. Alcohol consumption will enhance the toxic effects of diethyl ether).
EYES - Code 3; SKIN - Code 12; INHALED - Code 15; INGESTED - Code 23
METHYL GREEN: is a triaminotriphenylmethane dye. It is a combustible powder and should never be handled close to heat or naked flame. Its toxicity has not been quantified but other dyes in this group are carcinogenic. Handle with care.
EYES - Code 2; SKIN - Code 12; INHALED - Code 16; INGESTED - Code 24
METHYL METHACRYLATE: is a skin and eye irritant. The vapour is a respiratory tract irritant. High concentrations of vapour or ingestion can cause central nervous system depression. Explosive peroxides can form on prolonged storage.
EYES - Code 2; SKIN - Code 12: INHALED - Code 15: INGESTED - Code 16
METHYL VIOLET: is an aminotriarylmethane dye. It is an eye irritant. This compound has not been thoroughly investigated for toxicity. Inhalation or ingestion of the powder may cause nausea, vomiting and diarrhoea.
EYES - Code 2: SKIN - Code 12: INHALED - Code 16: INGESTED - Code 20
METHYLENE BLUE: is a quinone-imine dye of the thiazin sub group. It is highly toxic and an eye irritant. It is also a combustible powder and should never be handled close to heat or naked flame.
EYES - Code 3; SKIN - Code 12; INHALED - Code 16; INGESTED - Code 21
MOLLIFEX: is a highly flammable substance and should not be handled close to heat or naked flame. The vapour is heavier than air and can travel along the ground to a point of ignition and flash back. It is an eye, skin and respiratory tract irritant.
EYES - Code 2; SKIN - Code 12; INHALED - Code 14; INGESTED - Code 20
3-N-MORPHOLINO ETHANE SULPHONIC ACID (MOPS): is an eye and skin irritant but is expected to be a low ingestion hazard.
EYES - Code 2; SKIN - Code 5; INHALED - Code 14; INGESTED - Code 19
MOUNTING MEDIUM: usually xylene or toluene based. XYLENE: is a moderately flammable liquid which is a mild eye and mucous membrane irritant. It is a primary skin irritant and a central nervous system depressant. It will defat skin and may cause dermatitis. Over exposure has led to death from respiratory failure.
EYES - Code 2; SKIN - Code 12; INHALED - Code 15; INGESTED - Code 27