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Class   252	COMPOSITIONS
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1

MISCELLANEOUS (E.G., ARTIFICIAL SNOW)

2

FIRE-EXTINGUISHING

3

Foam or gas phase containing

4

Gas generative, chemically

5

Dry, combustion type

6

Low temperature chemically interreactive

6.5

Foam-stabilizant or colloid-stabilizant containing

7

Carbonates or ammonium salts containing or pyrolytic

8

Volatile or gas charged liquids containing

8.05

Foam-stabilizant or colloid-stabilizant containing

601

FIRE RETARDING

602

Having disparate function

603

For living matter

604

Material physically quantified

605

Containing gas

606

Intumescent

607

For wood or cellulosic material other than textile

608

For textile (i.e., woven material)

609

For solid synthetic polymer and reactants thereof

610

Dispersion or colloidal system

611

For dispersion or collodial system

Class 507 is an integral part of this Class (Class 252), as shown by the position of this box, and follows the schedule hierarchy of this Class, retaining all pertinent definitions and Class lines of this class.
	8.57	LEATHER OR FUR TREATING (OTHER THAN CLEANING COMPOSITIONS OR AUXILIARY COMPOSITIONS FOR CLEANING)

8.61

DURABLE FINISHES FOR TEXTILE MATERIALS, OR PROCESSES OF PREPARING (E.G., CREASE RESISTANT, MOISTURE ABSORBENT, ANTISTATIC, ETC., FINISHES)

8.62

Oil or water repellent or soil resistant or retardant

8.63

Textile softening

8.81

TEXTILE PROCESSING AID COMPOSITIONS, OR PROCESSES OF PREPARING (E.G., LUBRICANTS OR ANTISTATIC AGENTS FOR FIBER, YARN, FABRIC, ETC.)

8.82

For tire cord yarn, elastomeric filaments, or biologically innocuous or absorbable fibers (e.g., spandex, textiles used in food packaging, absorbable surgical sutures, etc.)

8.83

Sizing agents (e.g., for weaving yarn, etc.)

8.84

For textile materials consisting wholly or in part of noncellulosic synthetic fibers (e.g., spin finish for nylon, polyester, acrylic, etc., fibers; lubricants for blends thereof with diverse fibers, etc.)

8.85

For textile materials consisting wholly or in part of animal hair fibers (e.g., wool, etc.)

8.86

For textile materials consisting wholly or in part of silk or cellulose- based fibers (e.g., cotton; artificial silk, such as rayon, cellulose acetate, etc., or blends thereof; silk soaking compositions; etc.)

8.91

COMPOSITIONS FOR ENHANCING THE APPEARANCE OF CONSUMER TEXTILE GOODS (OTHER THAN CLEANING COMPOSITIONS OR AUXILIARY COMPOSITIONS FOR CLEANING), OR PROCESSES OF PREPARING (E.G., ANTISTATIC OR WRINKLE-REMOVING SPRAY FOR GARMENTS, ETC.)

67

VAPORIZATION, OR EXPANSION, REFRIGERATION OR HEAT OR ENERGY EXCHANGE

68

With lubricants, or warning, stabilizing or anti-corrosion agents or persistent gases

69

With low-volatile solvent or absorbent

Class 508 is an integral part of this Class (Class 252), as shown by the position of this box, and follows the schedule hierarchy of this Class, retaining all pertinent definitions and Class lines of this class.
	60	PHYSICAL SEPARATION AGENTS

61

Froth-flotation or differential adherence

62

HEAT OR SOUND INSULATING

62.2

ELECTROLYTES FOR ELECTRICAL DEVICES (E.G., RECTIFIER, CONDENSER)

62.3R

BARRIER LAYER DEVICE COMPOSITIONS

62.3T

Thermoelectric

62.3Q

Organic

62.3E

Free element containing

62.3S

Selenium or tellurium

62.3GA

Group III element containing binary compound; e.g., Ga, As

62.3ZB

Groups II and V elements containing binary compund; e.g., zinc, bismuth

62.3ZT

Groups II and VI elements containing binary compound; e.g., Zn, Te

62.3V

Group VI element-containing

62.3BT

Containing Group IV element and oxygen; e.g., barium, titanium III oxide

62.3C

Binary alloy or carbide; e.g., Al, In, LiC

62.51R

MAGNETIC

62.52

Flaw detection or magnetic clutch

62.53

With wax, bitumen, resin, or gum

62.54

Synthetic resin

62.55

Free metal or alloy containing

62.56

Iron-oxygen compound containing

62.57

With scandium, yttrium, gallium, rare earth, or actinide

62.58

With boron, aluminum, thallium, or indium

62.59

With titanium, zirconium, silicon, hafnium, germanium, or tin

62.6

With Group I metal

62.61

Lithium

62.62

With Group II metal or lead

62.63

Calcium, barium, strontium, or lead

62.64

Magnesium

62.51C

Chromium or chromium compound containing

62.9R

PIEZOELECTRIC

62.9PZ

Lead, zirconium, titanium or compound thereof containing

567

DEFINED LIQUID DIELECTRIC DISPERSED IN DEFINED WEB OR SHEET

570

FLUENT DIELECTRIC

571

Gaseous or gas-containing

572

Metal- or insoluble component-containing; e.g., slurry, grease, etc.

573

Si-containing

574

B-, P-, S-, Se-, or Te-containing

575

N-containing

576

O in N compound

577

Nitro or nitroso compound

578

O-containing

579

Carboxylic acid ester

580

Halogen-containing

581

Halogenated polycyclic compound-containing

70

FROST-PREVENTING, ICE-THAWING, THERMOSTATIC, THERMOPHORIC, OR CRYOGENIC

71

HEAT-EXCHANGE, LOW-FREEZING OR POUR POINT, OR HIGH BOILING COMPOSITIONS

72

With leak-stopping agents

73

Organic components

74

Metal compounds or inorganic components (except water)

75

Organic compounds of nonmetals other than C, H, and O

76

Carboxylic organic compounds containing

77

Organic compounds of nonmetals other than C, H, and O

78.1

Organic compounds of nonmetals other than C, H, O, and N

78.3

Organic Si containing compounds

78.5

Organic P containing compounds

79

Carboxylic organic compounds containing

79.1

ETCHING OR BRIGHTENING COMPOSITIONS

79.2

Inorganic acid containing

79.3

Fluorine compound containing

79.4

With organic material

79.5

Alkali metal hydroxide containing

88.1

DUST SUPPRESSANTS FOR BULK MATERIALS, OR PROCESSES OF PREPARING (E.G., FOR CONSOLIDATING DUST IN COAL MINES, CONTROLLING SOIL EROSION, ETC.)

88.2

COMPOSITIONS FOR COATING OR IMPREGNATING A SUBSTRATE USED FOR COLLECTING FINE PARTICLES BY ADHERENCE, OR PROCESSES OF PREPARING (E.G., FOR IMPREGNATING DUSTING CLOTHS, DUST FILTERS, ETC.)

Class 510 is an integral part of this Class (Class 252), as shown by the position of this box, and follows the schedule hierarchy of this Class, retaining all pertinent definitions and Class lines of this class.
	175	WATER-SOFTENING OR PURIFYING OR SCALE-INHIBITING AGENTS

176

Packages or heterogeneous arrangements

178

Deoxidant or free-metal containing

179

Water-insoluble base-exchange agent containing

180

Plant or organic material containing

181

With inorganic matter other than alkali-metal hydroxides and carbonates and water

181.1

GETTERS OR GAS OR VAPOR GENERATING MATERIALS FOR ELECTRIC LAMPS, ELECTRIC SPACE DISCHARGE DEVICES, AND SIMILAR DEVICES

181.2

Plural getter and/or gas or vapor generating materials

181.3

Reactive compositions

181.4

Containing magnesium, alkali-metal and alkaline-earth metal, or compound thereof

181.5

Gaseous getters

181.6

Metal or metal compound containing

181.7

Magnesium, alkali-metal, or alkaline-earth metal

194

HUMIDOSTATIC, WATER REMOVIVE, BINDIVE, OR EMISSIVE

Class 502 is an integral part of this Class (Class 252), as shown by the position of this box, and follows the schedule hierarchy of this Class, retaining all pertinent definitions and Class lines of this class.
	478	X-RAY OR NEUTRON SHIELD

500

ELECTRICALLY CONDUCTIVE OR EMISSIVE COMPOSITIONS

501.1

Light sensitive

502

Elemental carbon containing

503

With free metal

504

With carbide

505

With radioactive material

506

With metal compound

507

Titanium or zirconium compound

508

Aluminum compound

509

Magnesium, alkaline earth metal, or rare earth metal compound

510

With organic component

511

Resin, rubber, or derivative thereof containing

512

Free metal containing

513

Iron group metal (iron, cobalt, nickel)

514

Noble metal (gold, silver, ruthenium, rhodium, palladium, osmium, iridium, platinum)

515

Tungsten

516

Carbide containing

517

Radioactive material containing

518.1

Metal compound containing

519.1

Compound viewed as composition (i.e., wherein atoms or molecules in a chemical formula are not present as whole small integer values or cannot be multiplied by a single-digit factor to yield integer values)

519.12

Titanium containing

519.13

Bismuth, ruthenium, or iridium containing

519.14

Sulfur, tellurium, selenium, nitrogen, phosphorus, or boron containing

519.15

Four diverse metals containing

519.2

Organometallic (e.g., soap, complex, etc.)

519.21

With additional organic compound

519.3

With organic compound

519.31

The organic compound contains silicon

519.32

The organic compound is a natural resin, protein, lignin, carbohydrate, or derivative thereof

519.33

The organic compound is a polymer

519.34

The metal compound contains halogen, sulfur, selenium, phosphorus, arsenic, boron, or nitrogen

519.4

Sulfur, selenium, or tellurium containing

519.5

Zinc compound

519.51

Additional diverse metal containing

519.52

With boron compound

519.53

With halogen compound

519.54

Silicon containing or with compound of bismuth or silicon

520.1

Tin compound

520.2

Titanium or zirconium compound

520.21

Additional diverse metal containing

520.22

Boron, silicon, phosphorus, nitrogen, hydrogen, carbon, or halogen containing

520.3

Silver, gold, or platinum compound

520.4

Vanadium compound

520.5

Tungsten or yttrium compound

521.1

Rare earth metal compound

521.2

Iron, cobalt, or nickel compound

521.3

Silicon containing or with silicon compound

521.4

Boron containing or with boron compound

521.5

Halogen, carbon, phosphorus, or nitrogen containing

521.6

With nonmetal compound containing halogen, nitrogen, phosphorus, or sulfur

492

INCANDESCENT MANTLE COMPOSITIONS

299.01

LIQUID CRYSTAL COMPOSITIONS

299.1

Containing pleochroic dye

299.2

Containing dopant salt

299.3

Containing charge-transfer agents

299.4

Containing nonchiral aligning agents

299.5

Containing nonchiral additive having no specified mesophase

299.6

Containing nonsteryl liquid crystalline compound of specified structure

299.61

Including heterocyclic ring

299.62

Including fused or bridged rings

299.63

Including fully saturated ring

299.64

Aryl ester of aryl acid having three benzene rings

299.65

Benzene rings linked by direct bond

299.66

Benzene rings linked by direct bond

299.67

Phenyl benzoate derivative

299.68

Including benzene rings bonded through azo, azoxy, or azomethine linkage

299.7

Cholesteric liquid crystal composition containing a sterol derivative

582

LIGHT TRANSMISSION MODIFYING COMPOSITIONS

583

Modification caused by energy other than light

584

Inorganic crystalline solid

585

Producing polarized light

586

Displaying color change

587

Infrared

588

Ultraviolet

589

Organic material

625

RADIOACTIVE COMPOSITIONS

634

In form of sol solution or gel

635

Including production of solid particles by chemical reaction

636

Nuclear reactor fuel

637

Actinide having nonactinide component

638

Oxide component

639

Carbon containing component

640

Free metal or metal compound component

641

Actinide nitrides only

642

Actinide carbides only

643

Actinide oxides only

644

As a source of radiation or heat

645

For tracing, tagging, or testing

646

Luminescent

647

Laser

301.16

ORGANIC LUMINESCENT MATERIAL CONTAINING COMPOSITIONS

301.17

Scintillating or lasing compositions

301.18

Heavy metal containing

301.19

Inspection penetrant compositions

301.21

Optical brightening compositions

301.22

Heterocyclic compounds having an intercyclic acyclic methine linkage

301.23

Triazines

301.24

Thiazoles or oxazoles

301.25

Azine containing

301.26

Six-membered ring having one hetero-N-atom

301.27

Azole containing

301.28

Thiazoles or oxazoles

301.29

Tri- or tetrazoles

301.31

Five-membered ring having four carbon atoms and one nitrogen atom

301.32

Hetero-S-atom or hetero-O-atom containing

301.33

With inorganic luminescent material

301.34

Natural resin, cellulose, or derivatives containing

301.35

Synthetic resin containing

301.36

INORGANIC LUMINESCENT COMPOSITIONS WITH ORGANIC NONLUMINESCENT MATERIAL

301.4R

INORGANIC LUMINESCENT COMPOSITIONS

301.5

Tungsten containing

301.6R

Zinc or cadmium containing

301.6S

Sulfur containing

301.6P

Phosphorus containing

301.6F

Group IV element containing

301.4S

Sulfur containing

301.4P

Phosphorus containing

301.4F

Group IV element containing

301.4H

Compositions containing halogen; e.g., halides and oxyhalides

700

CHEMILUMINESCENT

182.1

HAVING UTILITY AS A REACTIVE MATERIAL IN AN ELECTROCHEMICAL CELL; E.G., BATTERY, ETC.

184

ABSORPTIVE, OR BINDIVE, AND CHEMICALLY YIELDIVE (E.G., ION EXCHANGER)

185

PLUMBIFEROUS SULPHUR BINDANT OR MODIFIANT CONTAINING

186.1

OXIDATIVE BLEACHANT, OXIDANT CONTAINING, OR GENERATIVE

186.2

Composition containing two or more solid materials with defined physical dimensions; e.g., surface areas, volumes, etc., or process of producing said composition

186.21

Plural oxidants

186.22

Contains plural peroxides

186.23

Organic peroxide

186.24

Contains elemental material devoid of water

186.25

Composition containing a stabilizer or a product in the form of a surface-modified, impregnated, encapsulated, or surface-coated article; or process of producing said composition

186.26

Organic peroxide

186.27

Inorganic peroxide

186.28

Contains hydrogen peroxide

186.29

With organic material

186.3

Contains perborate

186.31

With organic material

186.32

Contains Group IA metal peroxide

186.33

Contains Group VIIB or Group VIII metal or compound thereof

186.34

Contains organohalogen compound as oxidant

186.35

Chloroisocyanurate

186.36

Contains free halogen or oxy-halogen acid type

186.37

Contains alkaline earth metal

186.38

Contains activator admixed with inorganic peroxide

186.39

Contains heterocyclic compound

186.4

Oxygen heterocycle

186.41

Hydrogen peroxide

186.42

Contains organic peroxide

186.43

Contains inorganic peroxide

186.44

Contains inorganic nitrogen containing compound

187.1

Free halogen or oxy-halogen acid type

187.2

Oxidant contains halogen other than chlorine

187.21

Chlorine dioxide or monoxide

187.22

With elemental chlorine

187.23

Chlorite

187.24

Hypochlorite

187.25

Alkali metal hypochlorite

187.26

Sodium

187.27

Alkaline earth metal hypochlorite

187.28

Calcium

187.29

With alkali metal compound

187.3

With alkaline earth metal compound

187.31

Chlorate or perchlorate

187.32

Hypochlorous acid

187.33

Oxidant contains N-Cl bond

187.34

Chloroisocyanurate

188.1

REDUCTIVE BLEACHANT, DEOXIDANT, REDUCTANT, OR GENERATIVE

188.2

Sulfur containing reductant, bleachant, deoxidant, or generative

188.21

Sulfite

188.22

Hydrosulfite (dithionite)

188.23

With organic additive

188.24

Contains nitrogen

188.25

Hydrogen generating

188.26

Hydride containing

188.27

Contains Al-H bond

188.28

Deoxidant or oxygen scavenging

189

CO, S, NEGATIVE ELEMENT, OR ACID, BINDANT CONTAINING

190

With absorbents

191

Basis-iron containing

192

Alkali-metal or alkali-metal compound containing

193

AMMONIA, ALKALI OR BASE, BINDANT CONTAINING

363.5

SOLIDS WITH SOLUTION OR DISPERSION AIDS

Class 516 is an integral part of this Class (Class 252), as shown by the position of this box, and follows the schedule hierarchy of this Class, retaining all pertinent definitions and Class lines of this class.
	364	SOLVENTS

365

ANTI-INGESTIBLE OR DENATURED

366

Alcohol type

367.1

SOAPS (I.E., ALKALI-METAL SALTS OF WATER-INSOLUBLE FATTY ACIDS OR OF ROSIN ACIDS)

372

GASEOUS COMPOSITIONS

373

Carbon-oxide and hydrogen containing

374

Nitrogen and hydrogen containing

375

Nitrogen from air or elementary nitrogen only and hydrogen from compounds

376

Hydrogen from hydrocarbons

377

From elementary nitrogen and hydrogen only or purification

378R

EXFOLIATED OR INTUMESCED

378P

Perlite

380

PRESERVATIVE AGENTS

381

Anti-caking, separative or protective coatings or zones

382

Foams, liquids, or fluids

383

Organic and inorganic matter containing

384

Organic compound containing

385

Inorganic compound or element containing

387

Anti-corrosion

388

Organic compound containing

389.1

Component inorganic or organic comprising element other than C,H,O,N,S, and halogen

389.2

Phosphorus containing

389.21

Nitrogen and/or sulfur in phosphorus compound

389.22

Pentavalent P, except H(n+2)PnO(3n+1)

389.23

Pentavalent P, except H(n+2)PnO(3n+1)

389.24

Trivalent P (e.g., phosphorus acid, phosphites, etc.)

389.3

Silicon containing

389.31

Organo silicon

389.32

Nitrogen containing (e.g., amino, etc.)

389.4

Boron containing

389.41

Organo boron

389.5

Chromium containing

389.51

Lead containing

389.52

Zinc or aluminium containing

389.53

Nickel, iron, cobalt, copper, manganese, mercury, or cadmium containing

389.54

Molybdenum, arsenic, antimony, vanadium, bismuth, tungsten, selenium, or tellurium containing

389.61

Group IIA metal containing

389.62

Alkali metal or NH4+ containing

390

Amine, amide, azo, or nitrogen-base radical containing

391

Sulphur organic compound containing

392

Oxygen organic compound containing

393

Phenol or quinone radical containing

394

Nitrogen organic compound containing

395

Sulphur organic compound containing

396

Oxygen organic compound containing

397

Anti-oxidants or chemical change inhibitants

398

Plant or animal matters of unknown compositions

399

Organic compound containing

400.1

Component inorganic or organic comprising element other than C,H,O,N,S, and halogen

400.2

Phosphorus containing

400.21

Nitrogen or sulfur in phosphorus compound

400.22

Pentavalent P, but not fully oxygenated

400.23

Pentavalent P, but not fully oxygenated

400.24

Trivalent P (e.g., phosphorous acid, phosphites, etc.)

400.3

Silicon containing

400.31

Organo silicon

400.4

Boron containing

400.41

Organo boron

400.5

Chromium containing

400.51

Lead containing

400.52

Zinc or aluminium containing

400.53

Nickel, iron, cobalt, copper, manganese, mercury, or cadmium containing

400.54

Molybdenum, arsenic, antimony, vanadium, bismuth, tungsten, selenium, or tellurium containing

400.61

Group IIA metal containing

400.62

Alkali metal or NH4+ containing

401

Amine, amide, azo, or nitrogen-base radical containing

402

Sulphur organic compound containing

403

Oxygen organic compound containing

404

Phenol or quinone radical containing

405

Nitrogen organic compound containing

406

Sulphur organic compound containing

407

Oxygen organic compound containing

408.1

NONREACTIVE ANALYTICAL, TESTING, OR INDICATING COMPOSITIONS

600

RADIATION SENSITIVE

182.11

COMPOSITIONS CONTAINING A SINGLE CHEMICAL REACTANT OR PLURAL NONINTERACTIVE CHEMICAL REACTANTS; I.E., NOT VIS-A-VIS

182.12

Organic reactant

182.13

For subsequent solid polymer treatment or preparation; e.g., crosslinking, grafting, curing, hardening, vulcanizing, etc.

182.14

Reactant contains element other than C, H, O, or N

182.15

Halogen

182.16

Bromine or iodine

182.17

Sulfur

182.18

Reactant contains ethylenic group

182.19

Cyclic anhydride moiety

182.2

Reactant contains isocyante (-N=C=O) or blocked isocyanate group

182.21

Two or more reactants containing isocyanate or blocked isocyanate groups

182.22

Urethane (-N-C(=O)-O-C-) group

182.23

Reactant contains oxygen

182.24

Reactant contains plural hydroxyl groups

182.25

Three or more reactants containing plural hydroxyl groups

182.26

Reactant contains nitrogen

182.27

Reactant contains ether linkage

182.28

Reactant contains carboxylic acid group or derivative thereof

182.29

With stabilizer or inhibitor

182.3

Reactant contains phosphorus, silicon, or sulfur atom, or contains metal-to-carbon bond

182.31

Reactant contains phenolic, phenolic ether, or inorganic phenolate group

182.32

Inorganic reactant other than sulfur containing

182.33

Reactant contains heavy metal

182.34

Reactant contains nitrogen

182.35

Reactant contains aluminum or phosphorus

183.11

CHEMICALLY INTERACTIVE REACTANTS (VIS-A-VIS)

183.12

With stabilizer or inhibitor

183.13

Organic reactant admixed with inorganic reactant

183.14

Inorganic reactants only

183.15

Calcium carbide precursors

183.16

Contains carbonate or bicarbonate

950

DOPING AGENT SOURCE MATERIAL

951

For vapor transport

960

SURFACE FLAW DETECTING COMPOSITIONS

961

STRESS OR CONTACT INDICATORS

962

TEMPERATURE OR THERMAL HISTORY

963

HUMIDITY OR MOISTURE INDICATORS

964

LEAK DETECTION

965

RETROSPECTIVE PRODUCT IDENTIFICATION (E.G., TAGS AND TRACERS, ETC.)

FOR101

Organic sulphoxy compound containing (252/8.7)

FOR102

Organic amine or amide containing (252/8.75)

FOR103

Organic amine or amide containing (252/8.8)

FOR104

Ether group containing (252/8.9)

FOR248

Products (252/368)

FOR249

Including saponification (252/369)

FOR250

With subsequent operations (252/370)

FOR251

Metal compound containing (252/518)

FOR252

Iron group compound (252/519)

FOR253

Titanium or zirconium compound (252/520)

FOR254

Magnesium, alkaline earth metal, or rare earth metal compound (252/521)

DIG18

ACTIVATION-PLATINUM

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