Sorting, Collection, and Classification Table for Experimental Waste (1)Revised in June 2023

Classification andColor of the Tank

TypeTarget

Summary

A-1

Flammable organic
waste liquid(The tank size is10 L.)

1. Aliphatic hydrocarbons.
Waste solvents such as petroleumether, hexane, heptane,and octane.
2. Oxygen-containing aliphatic compounds.
Waste solvents such as acetal, alcohols, acetone, ethyl
methyl ketone, and acetic acid esters.
3. Nitrogen-containing aliphatic compounds.
Waste solvents such as acetonitrile.
4. Aromatic compounds.
Waste solvents such as benzene and toluene.
5. Nitrogen-containing aromatic compounds. Waste solvents
such as pyridine.
6. Other liquids that are classified as class I petroleum of
hazardous materials.
Waste solvents containing a small amount of non-explosivehigh-boiling organic compounds are acceptable.
Caution: Precipitates and solid materials have to be filtrated.

1. Explosive materials themselves, materials that can easily
make explosive materials, materials having N–O, N–N,O–O, O–X bonds, or metal acetylides, are excluded.
These materials have to be treated to safe and harmlessones under the responsibility of the dischargers.
2. Chemicals that cause health problems such as benzidine
are excluded. These materials have to be treated to safeand harmless ones under the responsibility of thedischargers.
3. Filtration residues should be stored with their contents
clearly identified, and their further treatment isoutsourced to the contractor when collecting waste
chemicals.
4. When containing heavy metals, specify theirconcentrations in the comment box of the request form.
5. When containing organic halogen compounds, it isclassified as B.

1. Special flammable materials containing flammable organic
waste liquid
Caution: Precipitates and solid materials have to be filtrated.
1. Waste oil such as kerosene, mineral spirits, light oil, andturpentine oil.
2. Waste oil such as heavy oil, creosote oil, spindle oil, turbineoil, and transformer oil.
3. Waste oil such as gear oil and motor oil.
4. Waste oil extracted from plants and animals (liquid).
5. Other liquids that are classified as class II to IV petroleumof hazardous materials.
Waste solvents containing a small amount of non-explosivehigh-boiling organic compounds are acceptable.
Caution: Precipitates and solid materials have to be filtrated.
Caution: High viscosity wastezoil should be diluted withkerosene etc. to reduce the viscosity.

1. Special flammable materials, such as diethyl ether andcarbon disulfide and pentane, should be reduced to 5%
or less to the waste liquid and metal tanks discharged.

1. Waste liquids containing organic halogen compounds.
Waste solvents such as chloroform, methylene chloride,trichloroethylene, carbon tetrachloride, trifluoroacetic
acid, methyl bromide, methyl iodide, chlorobenzene, andbenzyl chloride.
2. Waste liquids of organic halogen compounds containingwater.
Waste solvents containing a small amount of non-explosivehigh-boiling organic compounds are acceptable.

1. PCB and waste containing PCB are excluded.
2. Explosive materials themselves, materials that can easily
make explosive materials, materials having N–O, N–N,O–O, O–X bonds, or metal acetylides, are excluded.
These materials have to be treated to be safe andharmless ones under the responsibility of the dischargers.
3. Filtration residues should be stored with their contents
clearly identified, and their further treatment is
outsourced to the contractor when collecting wastechemicals.
4. Adjust the pH to 4 or higher before discharging. If it isdifficult to adjust the pH, specify that in the commentbox of the request form (the tank will be disposed.).
1. PCB and waste containing PCB are excluded.
2. Adjust the pH to 4 or higher before discharging. If it isdifficult to adjust the pH, specify that in the commentbox of the request form (the tank will be disposed.).
3. When inorganic fluorine and phosphoric acidcompounds are contained, their treatment is outsourced
to the contractor when collecting waste chemicals.
4. Filtration residues should be stored with their contents
clearly identified, and their further treatment is
outsourced to the contractor when collecting wastechemicals.
5. Avoid mixing oxidants such as hydrogen peroxide andperchloric acid with organic solvents.
6. Waste liquids containing mercury are excluded.
1. Filtration residues should be stored with their contents
clearly identified, and their further treatment is
outsourced to the contractor when collecting waste
chemicals.

classification(Red)
The tank size is
10 L.

Caution: The 1st to the
3rd washing waste liquids
to be included together.

A-1
classification(metal)Containing special
flammable materials
materials

Waste oilA-2
classification(Red)

Organic halogen wasteliquidBclassification(Brown)Caution: The 1st to the
3rd washing waste liquids
to be included together.

Caution: Precipitates and solid materials have to be filtrated.

Incombustible organic
waste liquid(Inclusive of water)

C-1
classification(Green)Caution: The 1st to the
3rd washing waste liquids
to be included together.

1. Organic waste liquids containing 5% or higher of water.
2. Waste liquids of circulation-type aspirator.
3. Organometallic waste liquid (e.g., chelated complexes).
4. Aqueous phase having been used for extraction of organic
reactions.
5. Water-mixed waste liquids containing organic halogen
compounds are classified as B.
6. Waste liquids containing cyanide ions or the metal-cyano
complexes are classified as E–2.
Caution: Precipitates and solid materials have to be filtrated.

Photograph waste liquid

C-2classification(Green)Caution: The 1st to the
3rd washing waste liquids
to be included together.

1. Developing waste liquid.
2. Stopping waste liquid.
3. Copying waste liquid.
4. Fixing waste liquid.

1. Among transformer oil, PCB and waste oil containing
PCB are excluded.
2. Filtration residues should be stored with their contents
clearly identified, and their further treatment isoutsourced to the contractor when collecting waste
chemicals.
3. When mixing with waste liquids classified as A–1, it
should be discharged as A–1.

Caution: Precipitates and solid materials have to be filtrated.

If you have any questions, access the following URL and send a consultation form (only inJapanese): http://www.env.tohoku.ac.jp/mail/input2.html
Tohoku University Environment Conservation Center (ECC)
TEL (extension 92-7529 (only in Japanese) ) http://www.env.tohoku.ac.jp/index-j.html

Sorting, Collection, and Classification Table for Experimental Waste (2)Classification andColor of the Tank

Type
Inorganic mercurybased waste liquidDclassification(Yellow)

E-1
classification(White)E-2
2lassify-cation (White)

Caution: The 1st to the3rd washing waste liquids
to be included together.

Free cyanide-based
waste liquid(Wrap in a red tape)
Caution: The 1st to the
3rd washing waste liquids
to be included together.

Persistent cyan wasteliquid

E-2classification(White)-cation(Blue)

F-1

Caution: The 1st to the
3rd washing waste liquids
to be included together.

General inorganic wasteliquid[Heavy metal wasteliquid, chromic acidwaste liquid]classification(Blue)

F-2

Caution: The 1st to the
3rd washing waste liquids
to be included together.

Inorganic fluorine-,bromide-, andphosphoric acidbased waste liquidclassification(White)Caution: The 1st to the
3rd washing waste liquids
to be included together.

Biological waste liquid(flammable one)G-A
classification(Orange)

Caution: The 1st to the 3rd
washing waste liquids to beincluded together.
Caution: Infectious waste
and mutagenic substances
are excluded.

Biological waste liquid(Inflammable one)G-Cclassification(Orange)

Caution: The 1st to the 3rd
washing waste liquids to beincluded together.
Caution: Infectious waste
and mutagenic substances
are excluded.

TargetSummary

1. Inorganic mercury-based waste liquids.
2. When containing other heavy metals, label it such as"arsenic-containing" or "copper-containing" and specify
their concentrations.
Caution: The mercury ion concentration should be reduced
to 1000 ppm or less.
Caution: Precipitates and solid materials have to befiltrated.

1. Metallic mercury, amalgam mercury, and unneeded
mercury-based reagents, chemicals, organomercury,organic compounds and organic solvents are excluded.
These waste liquids have to be stored at the discharger,
and their further treatment is outsourced to the contractor
when collecting waste chemicals.
2. Filtration residues should be stored with their contents
clearly identified, and their further treatment isoutsourced to the contractor when collecting waste
chemicals.
1. Cyanide-based waste liquid must be kept at a pH of 11 or
higher for the safety. If it is difficult to adjust the pH,
specify that in the comment box of the request form (thetank will be disposed.).
2. When containing mercury cyanide or mercury, they haveto be stored at the discharger, and their further treatment
is outsourced to the contractor when collecting waste
chemicals.
3. Filtration residues should be stored with their contents
clearly identified, and their further treatment isoutsourced to the contractor when collecting waste
chemicals.

1. Free cyanide-based waste liquids that have been stored atz
a pH of 11 or higher.
2. The solvents are limited to inorganic aqueous solutions.
Caution: Precipitates and solid materials have to be filtrated.

1. The persistent metal-cyano complex such as KAg(CN)2,K2Ni(CN)4, K3Cu(CN)4, K3Fe(CN)6, K4Fe(CN)6,K3Co(CN)6, Kau(CN)2, with the dissociation constant ofcyanide ions of 10−21 or less.
2. Free cyanide-based waste liquids containing heavy metal.
3. Free cyanide-based waste liquids containing organic
compounds or organic solvents.
Caution: Precipitates and solid materials have to be filtrated.
1. Waste liquids of inorganic acid such as hydrochloric acid,sulfuric acid, and nitric acid.
2. Waste liquids containing a chromic acid–sulfuric acidmixture.
3. Waste liquids containing heavy metals such as Fe, Ni, Co,Zn, Cu, Mn, Cd, Pb, Ga, Cr, V, Ti, Ge, Sn etc.
4. Waste liquids containing light metals such as Al and Mg.
Caution: If gas evolution is observed, discharge it after gas
evolution has ceased.
Caution: When containing organic materials, it is classified
as C–1.
Caution: Precipitates and solid materials have to befiltrated.

1. For cyan, refer to E classification.
2. The extracted aqueous waste liquids containing heavy
metals having been used for organic reactions areclassified as C–1.
3. If the waste liquid contains beryllium (carcinogen),thallium (neuropathic disorder) or osmium (mucosal skindisorder), contact the ECC.
4. When containing inorganic fluorine, phosphatecompounds and bromine, it is classified as F–2.
5. Filtration residues should be stored with their contents
clearly identified, and their further treatment isoutsourced to the contractor when collecting waste
chemicals.

1. Hydrofluoric acid, etching zwaste liquid.
2. Inorganic phosphate waste liquid.
3. Inorganic waste liquids containing bromine or its
compounds.
Caution: Vapor inhalation of hydrogen fluoride causes
pulmonary edema, and its adhesion to the skin causes
hemorrhagic ulcers.
Caution: If gas evolution is observed, discharge it after gas
evolution has ceased.
Caution: Precipitates and solid materials have to befiltrated.
z
Waste liquids that is non-infectious and highly-flammable.
For example, xylene waste liquids, xylene-alcohol wasteliquids.

1. In the case of etching waste liquid, specify metals that
may be mixed in the comment box of the request form.
2. Aqueous ammonium solutions should not be mixed asmuch as possible.
3. Filtration residues should be stored with their contents
clearly identified, and their further treatment isoutsourced to the contractor when collecting waste
chemicals.

Caution: Precipitates and solid materials have to be filtrated.

Waste liquid that is non-infectious and flame retardant.
For example, ethidium bromide waste liquid, 20%-formalinwaste liquid.
Caution: Precipitates and solid materials have to be filtrated.

1. The water content is 5% or less.
2. Filtration residues should be stored with their contents
clearly identified, and their further treatment is
outsourced to the contractor when collecting waste
chemicals.
3. If filtration with a filter paper is difficult, use a sieve ofabout 80 mesh.
1. Waste liquids containing 5% or more of water.
2. Adjust the pH to 4 or higher before discharging. If it isdifficult to adjust the pH, specify that in the commentbox of the request form (the tank will be disposed.).
3. If the concentration of ethidium bromide waste liquid is
1 ppm or higher, specify that in the comment box of therequest form (the tank will be disposed.).
4. Filtration residues should be stored with their contents
clearly identified, and their further treatment is
outsourced to the contractor when collecting waste
chemicals.
5. If filtration with a filter paper is difficult, use a sieve ofabout 80 mesh.